16939057 has 2 divisors, whose sum is σ = 16939058. Its totient is φ = 16939056.

The previous prime is 16939037. The next prime is 16939061. The reversal of 16939057 is 75093961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14130081 + 2808976 = 3759^2 + 1676^2 .

It is a cyclic number.

It is not a de Polignac number, because 16939057 - 2²³ = 8550449 is a prime.

It is a super-4 number, since 4×16939057⁴ (a number of 30 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (16939037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8469528 + 8469529.

It is an arithmetic number, because the mean of its divisors is an integer number (8469529).

Almost surely, 2^16939057 is an apocalyptic number.

It is an amenable number.

16939057 is a deficient number, since it is larger than the sum of its proper divisors (1).

16939057 is an equidigital number, since it uses as much as digits as its factorization.

16939057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51030, while the sum is 40.

The square root of 16939057 is about 4115.7085659701. The cubic root of 16939057 is about 256.8205331049.

The spelling of 16939057 in words is "sixteen million, nine hundred thirty-nine thousand, fifty-seven".