16920697 has 4 divisors (see below), whose sum is σ = 17811280. Its totient is φ = 16030116.

The previous prime is 16920679. The next prime is 16920713. The reversal of 16920697 is 79602961.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 79602961 = 2357 ⋅33773.

It is a cyclic number.

It is not a de Polignac number, because 16920697 - 2⁷ = 16920569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16920647) 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, 445263 + ... + 445300.

It is an arithmetic number, because the mean of its divisors is an integer number (4452820).

Almost surely, 2^16920697 is an apocalyptic number.

It is an amenable number.

16920697 is a deficient number, since it is larger than the sum of its proper divisors (890583).

16920697 is an equidigital number, since it uses as much as digits as its factorization.

16920697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890582.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 16920697 is about 4113.4774826174. The cubic root of 16920697 is about 256.7277115347.

The spelling of 16920697 in words is "sixteen million, nine hundred twenty thousand, six hundred ninety-seven".