16772971 has 4 divisors (see below), whose sum is σ = 16845192. Its totient is φ = 16700752.

The previous prime is 16772927. The next prime is 16772983. The reversal of 16772971 is 17927761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17927761 = 1979 ⋅9059.

It is a cyclic number.

It is not a de Polignac number, because 16772971 - 2¹³ = 16764779 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16772471) 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, 35761 + ... + 36226.

It is an arithmetic number, because the mean of its divisors is an integer number (4211298).

Almost surely, 2^16772971 is an apocalyptic number.

16772971 is a deficient number, since it is larger than the sum of its proper divisors (72221).

16772971 is an equidigital number, since it uses as much as digits as its factorization.

16772971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72220.

The product of its digits is 37044, while the sum is 40.

The square root of 16772971 is about 4095.4817787411. The cubic root of 16772971 is about 255.9784069922.

The spelling of 16772971 in words is "sixteen million, seven hundred seventy-two thousand, nine hundred seventy-one".