16157639 has 2 divisors, whose sum is σ = 16157640. Its totient is φ = 16157638.

The previous prime is 16157629. The next prime is 16157699. The reversal of 16157639 is 93675161.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16157639 is a prime.

It is a super-2 number, since 2×16157639² = 522138596108642, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16157629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8078819 + 8078820.

It is an arithmetic number, because the mean of its divisors is an integer number (8078820).

Almost surely, 2^16157639 is an apocalyptic number.

16157639 is a deficient number, since it is larger than the sum of its proper divisors (1).

16157639 is an equidigital number, since it uses as much as digits as its factorization.

16157639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34020, while the sum is 38.

The square root of 16157639 is about 4019.6565773708. The cubic root of 16157639 is about 252.8090598470.

The spelling of 16157639 in words is "sixteen million, one hundred fifty-seven thousand, six hundred thirty-nine".