16931377 has 2 divisors, whose sum is σ = 16931378. Its totient is φ = 16931376.

The previous prime is 16931333. The next prime is 16931429. The reversal of 16931377 is 77313961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14447601 + 2483776 = 3801^2 + 1576^2 .

It is a cyclic number.

It is not a de Polignac number, because 16931377 - 2¹¹ = 16929329 is a prime.

It is a super-2 number, since 2×16931377² = 573343054232258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16931077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8465688 + 8465689.

It is an arithmetic number, because the mean of its divisors is an integer number (8465689).

Almost surely, 2^16931377 is an apocalyptic number.

It is an amenable number.

16931377 is a deficient number, since it is larger than the sum of its proper divisors (1).

16931377 is an equidigital number, since it uses as much as digits as its factorization.

16931377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23814, while the sum is 37.

The square root of 16931377 is about 4114.7754495233. The cubic root of 16931377 is about 256.7817139456.

The spelling of 16931377 in words is "sixteen million, nine hundred thirty-one thousand, three hundred seventy-seven".