16397677 has 4 divisors (see below), whose sum is σ = 16406460. Its totient is φ = 16388896.

The previous prime is 16397669. The next prime is 16397681. The reversal of 16397677 is 77679361.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 5148361 + 11249316 = 2269^2 + 3354^2 .

It is a cyclic number.

It is not a de Polignac number, because 16397677 - 2³ = 16397669 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 (16397687) 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, 352 + ... + 5737.

It is an arithmetic number, because the mean of its divisors is an integer number (4101615).

Almost surely, 2^16397677 is an apocalyptic number.

It is an amenable number.

16397677 is a deficient number, since it is larger than the sum of its proper divisors (8783).

16397677 is an equidigital number, since it uses as much as digits as its factorization.

16397677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8782.

The product of its digits is 333396, while the sum is 46.

The square root of 16397677 is about 4049.4045241245. The cubic root of 16397677 is about 254.0548221096.

It can be divided in two parts, 1639 and 7677, that added together give a triangular number (9316 = T₁₃₆).

The spelling of 16397677 in words is "sixteen million, three hundred ninety-seven thousand, six hundred seventy-seven".