1862472649 has 4 divisors (see below), whose sum is σ = 1865816964. Its totient is φ = 1859128336.

The previous prime is 1862472643. The next prime is 1862472659. The reversal of 1862472649 is 9462742681.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9462742681 = 7 ⋅1351820383.

It can be written as a sum of positive squares in 2 ways, for example, as 72590400 + 1789882249 = 8520^2 + 42307^2 .

It is a cyclic number.

It is not a de Polignac number, because 1862472649 - 2⁵ = 1862472617 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1862472643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1671322 + ... + 1672435.

It is an arithmetic number, because the mean of its divisors is an integer number (466454241).

Almost surely, 2^1862472649 is an apocalyptic number.

It is an amenable number.

1862472649 is a deficient number, since it is larger than the sum of its proper divisors (3344315).

1862472649 is an equidigital number, since it uses as much as digits as its factorization.

1862472649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3344314.

The product of its digits is 1161216, while the sum is 49.

The square root of 1862472649 is about 43156.3743727390. The cubic root of 1862472649 is about 1230.3536667790.

The spelling of 1862472649 in words is "one billion, eight hundred sixty-two million, four hundred seventy-two thousand, six hundred forty-nine".