16500139 has 2 divisors, whose sum is σ = 16500140. Its totient is φ = 16500138.

The previous prime is 16500103. The next prime is 16500161. The reversal of 16500139 is 93100561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16500139 - 2⁹ = 16499627 is a prime.

It is not a weakly prime, because it can be changed into another prime (16500179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8250069 + 8250070.

It is an arithmetic number, because the mean of its divisors is an integer number (8250070).

Almost surely, 2^16500139 is an apocalyptic number.

16500139 is a deficient number, since it is larger than the sum of its proper divisors (1).

16500139 is an equidigital number, since it uses as much as digits as its factorization.

16500139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 810, while the sum is 25.

The square root of 16500139 is about 4062.0363119992. The cubic root of 16500139 is about 254.5828833683.

The spelling of 16500139 in words is "sixteen million, five hundred thousand, one hundred thirty-nine".