123433431 has 12 divisors (see below), whose sum is σ = 180900216. Its totient is φ = 74807920.

The previous prime is 123433423. The next prime is 123433463. The reversal of 123433431 is 134334321.

It is not a de Polignac number, because 123433431 - 2³ = 123433423 is a prime.

It is a super-2 number, since 2×123433431² = 30471623776863522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123433231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 169656 + ... + 170381.

It is an arithmetic number, because the mean of its divisors is an integer number (15075018).

Almost surely, 2^123433431 is an apocalyptic number.

123433431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

123433431 is a deficient number, since it is larger than the sum of its proper divisors (57466785).

123433431 is a wasteful number, since it uses less digits than its factorization.

123433431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340062 (or 340051 counting only the distinct ones).

The product of its digits is 2592, while the sum is 24.

The square root of 123433431 is about 11110.0599008286. The cubic root of 123433431 is about 497.9024542417.

Adding to 123433431 its reverse (134334321), we get a palindrome (257767752).

It can be divided in two parts, 1 and 23433431, that added together give a palindrome (23433432).

The spelling of 123433431 in words is "one hundred twenty-three million, four hundred thirty-three thousand, four hundred thirty-one".