624869849 has 4 divisors (see below), whose sum is σ = 625440564. Its totient is φ = 624299136.

The previous prime is 624869837. The next prime is 624869857. The reversal of 624869849 is 948968426.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 217031824 + 407838025 = 14732^2 + 20195^2 .

It is a cyclic number.

It is not a de Polignac number, because 624869849 - 2²⁴ = 608092633 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 624869794 and 624869803.

It is not an unprimeable number, because it can be changed into a prime (624869809) 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, 283712 + ... + 285905.

It is an arithmetic number, because the mean of its divisors is an integer number (156360141).

Almost surely, 2^624869849 is an apocalyptic number.

It is an amenable number.

624869849 is a deficient number, since it is larger than the sum of its proper divisors (570715).

624869849 is a wasteful number, since it uses less digits than its factorization.

624869849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570714.

The product of its digits is 5971968, while the sum is 56.

The square root of 624869849 is about 24997.3968444716. The cubic root of 624869849 is about 854.9286211971.

The spelling of 624869849 in words is "six hundred twenty-four million, eight hundred sixty-nine thousand, eight hundred forty-nine".