624644497 has 2 divisors, whose sum is σ = 624644498. Its totient is φ = 624644496.

The previous prime is 624644479. The next prime is 624644519. The reversal of 624644497 is 794446426.

Together with previous prime (624644479) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 342102016 + 282542481 = 18496^2 + 16809^2 .

It is a cyclic number.

It is not a de Polignac number, because 624644497 - 2²³ = 616255889 is a prime.

It is not a weakly prime, because it can be changed into another prime (624644477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312322248 + 312322249.

It is an arithmetic number, because the mean of its divisors is an integer number (312322249).

Almost surely, 2^624644497 is an apocalyptic number.

It is an amenable number.

624644497 is a deficient number, since it is larger than the sum of its proper divisors (1).

624644497 is an equidigital number, since it uses as much as digits as its factorization.

624644497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1161216, while the sum is 46.

The square root of 624644497 is about 24992.8889286533. Note that the first 3 decimals coincide. The cubic root of 624644497 is about 854.8258355051.

The spelling of 624644497 in words is "six hundred twenty-four million, six hundred forty-four thousand, four hundred ninety-seven".