16972789 has 4 divisors (see below), whose sum is σ = 16981056. Its totient is φ = 16964524.

The previous prime is 16972771. The next prime is 16972819. The reversal of 16972789 is 98727961.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 16972789 - 2¹⁷ = 16841717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16972759) 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, 1572 + ... + 6034.

It is an arithmetic number, because the mean of its divisors is an integer number (4245264).

Almost surely, 2^16972789 is an apocalyptic number.

It is an amenable number.

16972789 is a deficient number, since it is larger than the sum of its proper divisors (8267).

16972789 is an equidigital number, since it uses as much as digits as its factorization.

16972789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8266.

The product of its digits is 381024, while the sum is 49.

The square root of 16972789 is about 4119.8044856522. The cubic root of 16972789 is about 256.9908953256.

The spelling of 16972789 in words is "sixteen million, nine hundred seventy-two thousand, seven hundred eighty-nine".