123431397 has 8 divisors (see below), whose sum is σ = 164730144. Its totient is φ = 82210128.

The previous prime is 123431381. The next prime is 123431401. The reversal of 123431397 is 793134321.

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

It is not a de Polignac number, because 123431397 - 2⁴ = 123431381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123431377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15543 + ... + 22100.

It is an arithmetic number, because the mean of its divisors is an integer number (20591268).

Almost surely, 2^123431397 is an apocalyptic number.

It is an amenable number.

123431397 is a deficient number, since it is larger than the sum of its proper divisors (41298747).

123431397 is a wasteful number, since it uses less digits than its factorization.

123431397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38739.

The product of its digits is 13608, while the sum is 33.

The square root of 123431397 is about 11109.9683617911. The cubic root of 123431397 is about 497.8997193285.

The spelling of 123431397 in words is "one hundred twenty-three million, four hundred thirty-one thousand, three hundred ninety-seven".