16639057 has 2 divisors, whose sum is σ = 16639058. Its totient is φ = 16639056.

The previous prime is 16639027. The next prime is 16639067. The reversal of 16639057 is 75093661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16613776 + 25281 = 4076^2 + 159^2 .

It is a cyclic number.

It is not a de Polignac number, because 16639057 - 2¹¹ = 16637009 is a prime.

It is not a weakly prime, because it can be changed into another prime (16639027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8319528 + 8319529.

It is an arithmetic number, because the mean of its divisors is an integer number (8319529).

Almost surely, 2^16639057 is an apocalyptic number.

It is an amenable number.

16639057 is a deficient number, since it is larger than the sum of its proper divisors (1).

16639057 is an equidigital number, since it uses as much as digits as its factorization.

16639057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34020, while the sum is 37.

The square root of 16639057 is about 4079.1000232895. The cubic root of 16639057 is about 255.2953491858.

The spelling of 16639057 in words is "sixteen million, six hundred thirty-nine thousand, fifty-seven".