16912397 has 4 divisors (see below), whose sum is σ = 17000220. Its totient is φ = 16824576.

The previous prime is 16912393. The next prime is 16912417. The reversal of 16912397 is 79321961.

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 1943236 + 14969161 = 1394^2 + 3869^2 .

It is a cyclic number.

It is not a de Polignac number, because 16912397 - 2² = 16912393 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16912397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16912393) 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, 43622 + ... + 44007.

It is an arithmetic number, because the mean of its divisors is an integer number (4250055).

Almost surely, 2^16912397 is an apocalyptic number.

It is an amenable number.

16912397 is a deficient number, since it is larger than the sum of its proper divisors (87823).

16912397 is an equidigital number, since it uses as much as digits as its factorization.

16912397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87822.

The product of its digits is 20412, while the sum is 38.

The square root of 16912397 is about 4112.4684801224. The cubic root of 16912397 is about 256.6857276750.

The spelling of 16912397 in words is "sixteen million, nine hundred twelve thousand, three hundred ninety-seven".