1231314399 has 32 divisors (see below), whose sum is σ = 2194496000. Its totient is φ = 666574272.

The previous prime is 1231314397. The next prime is 1231314401. The reversal of 1231314399 is 9934131321.

1231314399 is a `hidden beast` number, since 1 + 231 + 31 + 4 + 399 = 666.

It is an interprime number because it is at equal distance from previous prime (1231314397) and next prime (1231314401).

It is not a de Polignac number, because 1231314399 - 2¹ = 1231314397 is a prime.

It is a super-2 number, since 2×1231314399² = 3032270298369462402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231314397) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 167854 + ... + 175035.

It is an arithmetic number, because the mean of its divisors is an integer number (68578000).

Almost surely, 2^1231314399 is an apocalyptic number.

1231314399 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1231314399 is a deficient number, since it is larger than the sum of its proper divisors (963181601).

1231314399 is a wasteful number, since it uses less digits than its factorization.

1231314399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342924 (or 342918 counting only the distinct ones).

The product of its digits is 17496, while the sum is 36.

The square root of 1231314399 is about 35090.0897548011. The cubic root of 1231314399 is about 1071.8227873022.

The spelling of 1231314399 in words is "one billion, two hundred thirty-one million, three hundred fourteen thousand, three hundred ninety-nine".