123790657 has 4 divisors (see below), whose sum is σ = 127783936. Its totient is φ = 119797380.

The previous prime is 123790633. The next prime is 123790661. The reversal of 123790657 is 756097321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 123790657 - 2¹⁵ = 123757889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123790627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1996593 + ... + 1996654.

It is an arithmetic number, because the mean of its divisors is an integer number (31945984).

Almost surely, 2^123790657 is an apocalyptic number.

It is an amenable number.

123790657 is a deficient number, since it is larger than the sum of its proper divisors (3993279).

123790657 is an equidigital number, since it uses as much as digits as its factorization.

123790657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3993278.

The product of its (nonzero) digits is 79380, while the sum is 40.

The square root of 123790657 is about 11126.1249768282. The cubic root of 123790657 is about 498.3823144983.

The spelling of 123790657 in words is "one hundred twenty-three million, seven hundred ninety thousand, six hundred fifty-seven".