16972971 has 4 divisors (see below), whose sum is σ = 22630632. Its totient is φ = 11315312.

The previous prime is 16972961. The next prime is 16972979. The reversal of 16972971 is 17927961.

It is a happy number.

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 16972971 - 2¹⁷ = 16841899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16972979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2828826 + ... + 2828831.

It is an arithmetic number, because the mean of its divisors is an integer number (5657658).

Almost surely, 2^16972971 is an apocalyptic number.

16972971 is a deficient number, since it is larger than the sum of its proper divisors (5657661).

16972971 is an equidigital number, since it uses as much as digits as its factorization.

16972971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5657660.

The product of its digits is 47628, while the sum is 42.

The square root of 16972971 is about 4119.8265740198. The cubic root of 16972971 is about 256.9918138974.

The spelling of 16972971 in words is "sixteen million, nine hundred seventy-two thousand, nine hundred seventy-one".