624649061 has 2 divisors, whose sum is σ = 624649062. Its totient is φ = 624649060.

The previous prime is 624649033. The next prime is 624649097. The reversal of 624649061 is 160946426.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 541492900 + 83156161 = 23270^2 + 9119^2 .

It is a cyclic number.

It is not a de Polignac number, because 624649061 - 2²⁶ = 557540197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (624649021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312324530 + 312324531.

It is an arithmetic number, because the mean of its divisors is an integer number (312324531).

Almost surely, 2^624649061 is an apocalyptic number.

It is an amenable number.

624649061 is a deficient number, since it is larger than the sum of its proper divisors (1).

624649061 is an equidigital number, since it uses as much as digits as its factorization.

624649061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 624649061 is about 24992.9802344578. The cubic root of 624649061 is about 854.8279174444.

The spelling of 624649061 in words is "six hundred twenty-four million, six hundred forty-nine thousand, sixty-one".