123365587 has 2 divisors, whose sum is σ = 123365588. Its totient is φ = 123365586.

The previous prime is 123365573. The next prime is 123365591. The reversal of 123365587 is 785563321.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123365587 is a prime.

It is not a weakly prime, because it can be changed into another prime (123365087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61682793 + 61682794.

It is an arithmetic number, because the mean of its divisors is an integer number (61682794).

Almost surely, 2^123365587 is an apocalyptic number.

123365587 is a deficient number, since it is larger than the sum of its proper divisors (1).

123365587 is an equidigital number, since it uses as much as digits as its factorization.

123365587 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 151200, while the sum is 40.

The square root of 123365587 is about 11107.0062122968. The cubic root of 123365587 is about 497.8112150892.

The spelling of 123365587 in words is "one hundred twenty-three million, three hundred sixty-five thousand, five hundred eighty-seven".