16923131 has 4 divisors (see below), whose sum is σ = 17056512. Its totient is φ = 16789752.

The previous prime is 16923107. The next prime is 16923133. The reversal of 16923131 is 13132961.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16923131 is a prime.

It is a super-2 number, since 2×16923131² = 572784725686322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16923131.

It is not an unprimeable number, because it can be changed into a prime (16923133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66500 + ... + 66753.

It is an arithmetic number, because the mean of its divisors is an integer number (4264128).

Almost surely, 2^16923131 is an apocalyptic number.

16923131 is a deficient number, since it is larger than the sum of its proper divisors (133381).

16923131 is a wasteful number, since it uses less digits than its factorization.

16923131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133380.

The product of its digits is 972, while the sum is 26.

The square root of 16923131 is about 4113.7733287093. The cubic root of 16923131 is about 256.7400208245.

The spelling of 16923131 in words is "sixteen million, nine hundred twenty-three thousand, one hundred thirty-one".