123131965 has 8 divisors (see below), whose sum is σ = 161191008. Its totient is φ = 89550480.

The previous prime is 123131933. The next prime is 123131971. The reversal of 123131965 is 569131321.

It is a happy number.

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

It is not a de Polignac number, because 123131965 - 2⁵ = 123131933 is a prime.

It is a super-2 number, since 2×123131965² = 30322961609522450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1119327 + ... + 1119436.

It is an arithmetic number, because the mean of its divisors is an integer number (20148876).

Almost surely, 2^123131965 is an apocalyptic number.

It is an amenable number.

123131965 is a deficient number, since it is larger than the sum of its proper divisors (38059043).

123131965 is a wasteful number, since it uses less digits than its factorization.

123131965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2238779.

The product of its digits is 4860, while the sum is 31.

The square root of 123131965 is about 11096.4843531634. The cubic root of 123131965 is about 497.4967753131.

The spelling of 123131965 in words is "one hundred twenty-three million, one hundred thirty-one thousand, nine hundred sixty-five".