1864336049 has 4 divisors (see below), whose sum is σ = 1864427364. Its totient is φ = 1864244736.

The previous prime is 1864336009. The next prime is 1864336081. The reversal of 1864336049 is 9406334681.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9406334681 = 31 ⋅303430151.

It can be written as a sum of positive squares in 2 ways, for example, as 884646049 + 979690000 = 29743^2 + 31300^2 .

It is a cyclic number.

It is not a de Polignac number, because 1864336049 - 2²⁰ = 1863287473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1864336009) 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, 569 + ... + 61065.

It is an arithmetic number, because the mean of its divisors is an integer number (466106841).

Almost surely, 2^1864336049 is an apocalyptic number.

It is an amenable number.

1864336049 is a deficient number, since it is larger than the sum of its proper divisors (91315).

1864336049 is an equidigital number, since it uses as much as digits as its factorization.

1864336049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91314.

The product of its (nonzero) digits is 373248, while the sum is 44.

The square root of 1864336049 is about 43177.9579067839. The cubic root of 1864336049 is about 1230.7638521052.

The spelling of 1864336049 in words is "one billion, eight hundred sixty-four million, three hundred thirty-six thousand, forty-nine".