16974431 has 4 divisors (see below), whose sum is σ = 17013192. Its totient is φ = 16935672.

The previous prime is 16974427. The next prime is 16974443. The reversal of 16974431 is 13447961.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16974431 - 2² = 16974427 is a prime.

It is a super-2 number, since 2×16974431² = 576262615547522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16974391 and 16974400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16974401) 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, 18716 + ... + 19601.

It is an arithmetic number, because the mean of its divisors is an integer number (4253298).

Almost surely, 2^16974431 is an apocalyptic number.

16974431 is a deficient number, since it is larger than the sum of its proper divisors (38761).

16974431 is an equidigital number, since it uses as much as digits as its factorization.

16974431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38760.

The product of its digits is 18144, while the sum is 35.

The square root of 16974431 is about 4120.0037621342. The cubic root of 16974431 is about 256.9991824226. Note that the first 3 decimals are identical.

The spelling of 16974431 in words is "sixteen million, nine hundred seventy-four thousand, four hundred thirty-one".