16923139 has 2 divisors, whose sum is σ = 16923140. Its totient is φ = 16923138.

The previous prime is 16923133. The next prime is 16923161. The reversal of 16923139 is 93132961.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16923139 - 2⁵ = 16923107 is a prime.

It is a super-2 number, since 2×16923139² = 572785267226642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16923133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8461569 + 8461570.

It is an arithmetic number, because the mean of its divisors is an integer number (8461570).

Almost surely, 2^16923139 is an apocalyptic number.

16923139 is a deficient number, since it is larger than the sum of its proper divisors (1).

16923139 is an equidigital number, since it uses as much as digits as its factorization.

16923139 is an evil number, because the sum of its binary digits is even.

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

The square root of 16923139 is about 4113.7743010525. The cubic root of 16923139 is about 256.7400612804.

The spelling of 16923139 in words is "sixteen million, nine hundred twenty-three thousand, one hundred thirty-nine".