16977577 has 4 divisors (see below), whose sum is σ = 17976276. Its totient is φ = 15978880.

The previous prime is 16977547. The next prime is 16977589. The reversal of 16977577 is 77577961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77577961 = 199 ⋅389839.

It can be written as a sum of positive squares in 2 ways, for example, as 8590761 + 8386816 = 2931^2 + 2896^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16977577 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 16977577.

It is not an unprimeable number, because it can be changed into a prime (16977517) 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, 499324 + ... + 499357.

It is an arithmetic number, because the mean of its divisors is an integer number (4494069).

Almost surely, 2^16977577 is an apocalyptic number.

16977577 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

16977577 is a deficient number, since it is larger than the sum of its proper divisors (998699).

16977577 is an equidigital number, since it uses as much as digits as its factorization.

16977577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 998698.

The product of its digits is 648270, while the sum is 49.

The square root of 16977577 is about 4120.3855402134. The cubic root of 16977577 is about 257.0150586442.

The spelling of 16977577 in words is "sixteen million, nine hundred seventy-seven thousand, five hundred seventy-seven".