16972489 has 2 divisors, whose sum is σ = 16972490. Its totient is φ = 16972488.

The previous prime is 16972481. The next prime is 16972517. The reversal of 16972489 is 98427961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9859600 + 7112889 = 3140^2 + 2667^2 .

It is a cyclic number.

It is not a de Polignac number, because 16972489 - 2³ = 16972481 is a prime.

It is not a weakly prime, because it can be changed into another prime (16972481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8486244 + 8486245.

It is an arithmetic number, because the mean of its divisors is an integer number (8486245).

Almost surely, 2^16972489 is an apocalyptic number.

It is an amenable number.

16972489 is a deficient number, since it is larger than the sum of its proper divisors (1).

16972489 is an equidigital number, since it uses as much as digits as its factorization.

16972489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 46.

The square root of 16972489 is about 4119.7680759965. The cubic root of 16972489 is about 256.9893811820.

It can be divided in two parts, 1697 and 2489, that added together give a triangular number (4186 = T₉₁).

The spelling of 16972489 in words is "sixteen million, nine hundred seventy-two thousand, four hundred eighty-nine".