623664487 has 2 divisors, whose sum is σ = 623664488. Its totient is φ = 623664486.

The previous prime is 623664463. The next prime is 623664511. The reversal of 623664487 is 784466326.

It is a balanced prime because it is at equal distance from previous prime (623664463) and next prime (623664511).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-623664487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (623664187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311832243 + 311832244.

It is an arithmetic number, because the mean of its divisors is an integer number (311832244).

Almost surely, 2^623664487 is an apocalyptic number.

623664487 is a deficient number, since it is larger than the sum of its proper divisors (1).

623664487 is an equidigital number, since it uses as much as digits as its factorization.

623664487 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 623664487 is about 24973.2754559749. The cubic root of 623664487 is about 854.3785536968.

The spelling of 623664487 in words is "six hundred twenty-three million, six hundred sixty-four thousand, four hundred eighty-seven".