16973431 has 2 divisors, whose sum is σ = 16973432. Its totient is φ = 16973430.

The previous prime is 16973413. The next prime is 16973443. The reversal of 16973431 is 13437961.

Together with previous prime (16973413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16973431 is a prime.

It is a super-3 number, since 3×16973431³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16973401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8486715 + 8486716.

It is an arithmetic number, because the mean of its divisors is an integer number (8486716).

Almost surely, 2^16973431 is an apocalyptic number.

16973431 is a deficient number, since it is larger than the sum of its proper divisors (1).

16973431 is an equidigital number, since it uses as much as digits as its factorization.

16973431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 34.

The square root of 16973431 is about 4119.8824012343. The cubic root of 16973431 is about 256.9941355331.

The spelling of 16973431 in words is "sixteen million, nine hundred seventy-three thousand, four hundred thirty-one".