16977791 has 2 divisors, whose sum is σ = 16977792. Its totient is φ = 16977790.

The previous prime is 16977769. The next prime is 16977809. The reversal of 16977791 is 19777961.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16977791 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16977761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8488895 + 8488896.

It is an arithmetic number, because the mean of its divisors is an integer number (8488896).

Almost surely, 2^16977791 is an apocalyptic number.

16977791 is a deficient number, since it is larger than the sum of its proper divisors (1).

16977791 is an equidigital number, since it uses as much as digits as its factorization.

16977791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 166698, while the sum is 47.

The square root of 16977791 is about 4120.4115085753. The cubic root of 16977791 is about 257.0161385193.

The spelling of 16977791 in words is "sixteen million, nine hundred seventy-seven thousand, seven hundred ninety-one".