16974399 has 16 divisors (see below), whose sum is σ = 24468192. Its totient is φ = 10405248.

The previous prime is 16974371. The next prime is 16974401. The reversal of 16974399 is 99347961.

It is a Cunningham number, because it is equal to 4120²-1.

It is not a de Polignac number, because 16974399 - 2⁷ = 16974271 is a prime.

It is a super-2 number, since 2×16974399² = 576260442822402, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16974499) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11677 + ... + 13049.

It is an arithmetic number, because the mean of its divisors is an integer number (1529262).

Almost surely, 2^16974399 is an apocalyptic number.

16974399 is a deficient number, since it is larger than the sum of its proper divisors (7493793).

16974399 is a wasteful number, since it uses less digits than its factorization.

16974399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1706.

The product of its digits is 367416, while the sum is 48.

The square root of 16974399 is about 4119.9998786408. Note that the first 3 decimals coincide. The cubic root of 16974399 is about 256.9990209252. Note that the first 3 decimals are identical.

The spelling of 16974399 in words is "sixteen million, nine hundred seventy-four thousand, three hundred ninety-nine".