16857157 has 2 divisors, whose sum is σ = 16857158. Its totient is φ = 16857156.

The previous prime is 16857121. The next prime is 16857179. The reversal of 16857157 is 75175861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11329956 + 5527201 = 3366^2 + 2351^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16857157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16857107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8428578 + 8428579.

It is an arithmetic number, because the mean of its divisors is an integer number (8428579).

Almost surely, 2^16857157 is an apocalyptic number.

It is an amenable number.

16857157 is a deficient number, since it is larger than the sum of its proper divisors (1).

16857157 is an equidigital number, since it uses as much as digits as its factorization.

16857157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58800, while the sum is 40.

The square root of 16857157 is about 4105.7468260963. The cubic root of 16857157 is about 256.4059568581.

The spelling of 16857157 in words is "sixteen million, eight hundred fifty-seven thousand, one hundred fifty-seven".