123431811 has 8 divisors (see below), whose sum is σ = 164634960. Its totient is φ = 82258272.

The previous prime is 123431807. The next prime is 123431813. The reversal of 123431811 is 118134321.

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

It is not a de Polignac number, because 123431811 - 2² = 123431807 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123431813) 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, 5581 + ... + 16673.

It is an arithmetic number, because the mean of its divisors is an integer number (20579370).

Almost surely, 2^123431811 is an apocalyptic number.

123431811 is a deficient number, since it is larger than the sum of its proper divisors (41203149).

123431811 is a wasteful number, since it uses less digits than its factorization.

123431811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14805.

The product of its digits is 576, while the sum is 24.

The square root of 123431811 is about 11109.9869936918. The cubic root of 123431811 is about 497.9002759947.

The spelling of 123431811 in words is "one hundred twenty-three million, four hundred thirty-one thousand, eight hundred eleven".