624642761 has 2 divisors, whose sum is σ = 624642762. Its totient is φ = 624642760.

The previous prime is 624642719. The next prime is 624642773. The reversal of 624642761 is 167246426.

624642761 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 564347536 + 60295225 = 23756^2 + 7765^2 .

It is a cyclic number.

It is not a de Polignac number, because 624642761 - 2²⁶ = 557533897 is a prime.

It is not a weakly prime, because it can be changed into another prime (624642791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312321380 + 312321381.

It is an arithmetic number, because the mean of its divisors is an integer number (312321381).

Almost surely, 2^624642761 is an apocalyptic number.

It is an amenable number.

624642761 is a deficient number, since it is larger than the sum of its proper divisors (1).

624642761 is an equidigital number, since it uses as much as digits as its factorization.

624642761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 38.

The square root of 624642761 is about 24992.8541987505. The cubic root of 624642761 is about 854.8250435992.

The spelling of 624642761 in words is "six hundred twenty-four million, six hundred forty-two thousand, seven hundred sixty-one".