16908457 has 2 divisors, whose sum is σ = 16908458. Its totient is φ = 16908456.

The previous prime is 16908443. The next prime is 16908467. The reversal of 16908457 is 75480961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15280281 + 1628176 = 3909^2 + 1276^2 .

It is a cyclic number.

It is not a de Polignac number, because 16908457 - 2⁷ = 16908329 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16908467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8454228 + 8454229.

It is an arithmetic number, because the mean of its divisors is an integer number (8454229).

Almost surely, 2^16908457 is an apocalyptic number.

It is an amenable number.

16908457 is a deficient number, since it is larger than the sum of its proper divisors (1).

16908457 is an equidigital number, since it uses as much as digits as its factorization.

16908457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 16908457 is about 4111.9894211926. The cubic root of 16908457 is about 256.6657931793.

The spelling of 16908457 in words is "sixteen million, nine hundred eight thousand, four hundred fifty-seven".