624980869 has 2 divisors, whose sum is σ = 624980870. Its totient is φ = 624980868.

The previous prime is 624980857. The next prime is 624980887. The reversal of 624980869 is 968089426.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 618168769 + 6812100 = 24863^2 + 2610^2 .

It is a cyclic number.

It is not a de Polignac number, because 624980869 - 2¹¹ = 624978821 is a prime.

It is a super-2 number, since 2×624980869² = 781202173231990322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (624980849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312490434 + 312490435.

It is an arithmetic number, because the mean of its divisors is an integer number (312490435).

Almost surely, 2^624980869 is an apocalyptic number.

It is an amenable number.

624980869 is a deficient number, since it is larger than the sum of its proper divisors (1).

624980869 is an equidigital number, since it uses as much as digits as its factorization.

624980869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1492992, while the sum is 52.

The square root of 624980869 is about 24999.6173770720. The cubic root of 624980869 is about 854.9792496360.

The spelling of 624980869 in words is "six hundred twenty-four million, nine hundred eighty thousand, eight hundred sixty-nine".