612660623 has 2 divisors, whose sum is σ = 612660624. Its totient is φ = 612660622.

The previous prime is 612660613. The next prime is 612660649. The reversal of 612660623 is 326066216.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-612660623 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 612660623.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (612660613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306330311 + 306330312.

It is an arithmetic number, because the mean of its divisors is an integer number (306330312).

Almost surely, 2^612660623 is an apocalyptic number.

612660623 is a deficient number, since it is larger than the sum of its proper divisors (1).

612660623 is an equidigital number, since it uses as much as digits as its factorization.

612660623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 612660623 is about 24751.9822034519. The cubic root of 612660623 is about 849.3238558354.

The spelling of 612660623 in words is "six hundred twelve million, six hundred sixty thousand, six hundred twenty-three".