123390791 has 8 divisors (see below), whose sum is σ = 130032864. Its totient is φ = 116855200.

The previous prime is 123390781. The next prime is 123390793. The reversal of 123390791 is 197093321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 123390791 - 2¹⁰ = 123389767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123390793) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24236 + ... + 28881.

It is an arithmetic number, because the mean of its divisors is an integer number (16254108).

Almost surely, 2^123390791 is an apocalyptic number.

123390791 is a deficient number, since it is larger than the sum of its proper divisors (6642073).

123390791 is a wasteful number, since it uses less digits than its factorization.

123390791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53241.

The product of its (nonzero) digits is 10206, while the sum is 35.

The square root of 123390791 is about 11108.1407535195. The cubic root of 123390791 is about 497.8451142767.

The spelling of 123390791 in words is "one hundred twenty-three million, three hundred ninety thousand, seven hundred ninety-one".