16977157 has 4 divisors (see below), whose sum is σ = 17391276. Its totient is φ = 16563040.

The previous prime is 16977143. The next prime is 16977161. The reversal of 16977157 is 75177961.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6421156 + 10556001 = 2534^2 + 3249^2 .

It is a cyclic number.

It is not a de Polignac number, because 16977157 - 2⁷ = 16977029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16977167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206998 + ... + 207079.

It is an arithmetic number, because the mean of its divisors is an integer number (4347819).

Almost surely, 2^16977157 is an apocalyptic number.

It is an amenable number.

16977157 is a deficient number, since it is larger than the sum of its proper divisors (414119).

16977157 is an equidigital number, since it uses as much as digits as its factorization.

16977157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414118.

The product of its digits is 92610, while the sum is 43.

The square root of 16977157 is about 4120.3345737937. The cubic root of 16977157 is about 257.0129392366.

The spelling of 16977157 in words is "sixteen million, nine hundred seventy-seven thousand, one hundred fifty-seven".