123691375 has 16 divisors (see below), whose sum is σ = 155181312. Its totient is φ = 98431200.

The previous prime is 123691369. The next prime is 123691391. The reversal of 123691375 is 573196321.

It is not a de Polignac number, because 123691375 - 2⁹ = 123690863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22114 + ... + 27136.

It is an arithmetic number, because the mean of its divisors is an integer number (9698832).

Almost surely, 2^123691375 is an apocalyptic number.

123691375 is a deficient number, since it is larger than the sum of its proper divisors (31489937).

123691375 is an equidigital number, since it uses as much as digits as its factorization.

123691375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5235 (or 5225 counting only the distinct ones).

The product of its digits is 34020, while the sum is 37.

The square root of 123691375 is about 11121.6624206995. The cubic root of 123691375 is about 498.2490421172.

The spelling of 123691375 in words is "one hundred twenty-three million, six hundred ninety-one thousand, three hundred seventy-five".