13973431 has 2 divisors, whose sum is σ = 13973432. Its totient is φ = 13973430.

The previous prime is 13973423. The next prime is 13973461. The reversal of 13973431 is 13437931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13973431 - 2³ = 13973423 is a prime.

It is a super-2 number, since 2×13973431² = 390513547823522, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 13973393 and 13973402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13973461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6986715 + 6986716.

It is an arithmetic number, because the mean of its divisors is an integer number (6986716).

Almost surely, 2^13973431 is an apocalyptic number.

13973431 is a deficient number, since it is larger than the sum of its proper divisors (1).

13973431 is an equidigital number, since it uses as much as digits as its factorization.

13973431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6804, while the sum is 31.

The square root of 13973431 is about 3738.1052687157. The cubic root of 13973431 is about 240.8616654155.

The spelling of 13973431 in words is "thirteen million, nine hundred seventy-three thousand, four hundred thirty-one".