16972090 has 16 divisors (see below), whose sum is σ = 30866472. Its totient is φ = 6718464.

The previous prime is 16972051. The next prime is 16972093. The reversal of 16972090 is 9027961.

It can be written as a sum of positive squares in 4 ways, for example, as 7306209 + 9665881 = 2703^2 + 3109^2 .

It is not an unprimeable number, because it can be changed into a prime (16972093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7779 + ... + 9718.

Almost surely, 2^16972090 is an apocalyptic number.

16972090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16972090 is a deficient number, since it is larger than the sum of its proper divisors (13894382).

16972090 is a wasteful number, since it uses less digits than its factorization.

16972090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17601.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 16972090 is about 4119.7196506559. The cubic root of 16972090 is about 256.9873673432.

The spelling of 16972090 in words is "sixteen million, nine hundred seventy-two thousand, ninety".