123431193 has 6 divisors (see below), whose sum is σ = 178289514. Its totient is φ = 82287456.

The previous prime is 123431177. The next prime is 123431207. The reversal of 123431193 is 391134321.

It can be written as a sum of positive squares in only one way, i.e., 121616784 + 1814409 = 11028^2 + 1347^2 .

It is not a de Polignac number, because 123431193 - 2⁴ = 123431177 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (123431123) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6857280 + ... + 6857297.

It is an arithmetic number, because the mean of its divisors is an integer number (29714919).

Almost surely, 2^123431193 is an apocalyptic number.

It is an amenable number.

123431193 is a deficient number, since it is larger than the sum of its proper divisors (54858321).

123431193 is a wasteful number, since it uses less digits than its factorization.

123431193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13714583 (or 13714580 counting only the distinct ones).

The product of its digits is 1944, while the sum is 27.

The square root of 123431193 is about 11109.9591808431. The cubic root of 123431193 is about 497.8994450288.

The spelling of 123431193 in words is "one hundred twenty-three million, four hundred thirty-one thousand, one hundred ninety-three".