1814874749 has 4 divisors (see below), whose sum is σ = 1821333660. Its totient is φ = 1808415840.

The previous prime is 1814874709. The next prime is 1814874793. The reversal of 1814874749 is 9474784181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9474784181 = 48779 ⋅194239.

It can be written as a sum of positive squares in 2 ways, for example, as 1527402724 + 287472025 = 39082^2 + 16955^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1814874749 is a prime.

It is a super-3 number, since 3×1814874749³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1814874749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1814874709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3229034 + ... + 3229595.

It is an arithmetic number, because the mean of its divisors is an integer number (455333415).

Almost surely, 2^1814874749 is an apocalyptic number.

It is an amenable number.

1814874749 is a deficient number, since it is larger than the sum of its proper divisors (6458911).

1814874749 is an equidigital number, since it uses as much as digits as its factorization.

1814874749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6458910.

The product of its digits is 1806336, while the sum is 53.

The square root of 1814874749 is about 42601.3467979593. The cubic root of 1814874749 is about 1219.7819974623.

The spelling of 1814874749 in words is "one billion, eight hundred fourteen million, eight hundred seventy-four thousand, seven hundred forty-nine".