16972643 has 8 divisors (see below), whose sum is σ = 18643200. Its totient is φ = 15379848.

The previous prime is 16972639. The next prime is 16972663. The reversal of 16972643 is 34627961.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16972643 - 2² = 16972639 is a prime.

It is a super-2 number, since 2×16972643² = 576141220810898, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16972597 and 16972606.

It is not an unprimeable number, because it can be changed into a prime (16972633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18983 + ... + 19856.

It is an arithmetic number, because the mean of its divisors is an integer number (2330400).

Almost surely, 2^16972643 is an apocalyptic number.

16972643 is a deficient number, since it is larger than the sum of its proper divisors (1670557).

16972643 is a wasteful number, since it uses less digits than its factorization.

16972643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38881.

The product of its digits is 54432, while the sum is 38.

The square root of 16972643 is about 4119.7867663266. The cubic root of 16972643 is about 256.9901584446.

The spelling of 16972643 in words is "sixteen million, nine hundred seventy-two thousand, six hundred forty-three".