123401659 has 2 divisors, whose sum is σ = 123401660. Its totient is φ = 123401658.

The previous prime is 123401633. The next prime is 123401671. The reversal of 123401659 is 956104321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123401659 - 2²³ = 115013051 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123401659.

It is not a weakly prime, because it can be changed into another prime (123407659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61700829 + 61700830.

It is an arithmetic number, because the mean of its divisors is an integer number (61700830).

Almost surely, 2^123401659 is an apocalyptic number.

123401659 is a deficient number, since it is larger than the sum of its proper divisors (1).

123401659 is an equidigital number, since it uses as much as digits as its factorization.

123401659 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 123401659 is about 11108.6299335247. The cubic root of 123401659 is about 497.8597302294.

The spelling of 123401659 in words is "one hundred twenty-three million, four hundred one thousand, six hundred fifty-nine".