16931293 has 6 divisors (see below), whose sum is σ = 17336094. Its totient is φ = 16535736.

The previous prime is 16931279. The next prime is 16931309. The reversal of 16931293 is 39213961.

It can be written as a sum of positive squares in only one way, i.e., 11539609 + 5391684 = 3397^2 + 2322^2 .

It is not a de Polignac number, because 16931293 - 2¹⁷ = 16800221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16935293) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2730 + ... + 6427.

It is an arithmetic number, because the mean of its divisors is an integer number (2889349).

Almost surely, 2^16931293 is an apocalyptic number.

It is an amenable number.

16931293 is a deficient number, since it is larger than the sum of its proper divisors (404801).

16931293 is an frugal number, since it uses more digits than its factorization.

16931293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9243 (or 9200 counting only the distinct ones).

The product of its digits is 8748, while the sum is 34.

The square root of 16931293 is about 4114.7652423923. The cubic root of 16931293 is about 256.7812892961.

The spelling of 16931293 in words is "sixteen million, nine hundred thirty-one thousand, two hundred ninety-three".