16972787 has 4 divisors (see below), whose sum is σ = 18278400. Its totient is φ = 15667176.

The previous prime is 16972771. The next prime is 16972819. The reversal of 16972787 is 78727961.

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 16972787 - 2⁴ = 16972771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16972727) 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, 652787 + ... + 652812.

It is an arithmetic number, because the mean of its divisors is an integer number (4569600).

Almost surely, 2^16972787 is an apocalyptic number.

16972787 is a deficient number, since it is larger than the sum of its proper divisors (1305613).

16972787 is a wasteful number, since it uses less digits than its factorization.

16972787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1305612.

The product of its digits is 296352, while the sum is 47.

The square root of 16972787 is about 4119.8042429222. The cubic root of 16972787 is about 256.9908852314.

The spelling of 16972787 in words is "sixteen million, nine hundred seventy-two thousand, seven hundred eighty-seven".