16972556 has 6 divisors (see below), whose sum is σ = 29701980. Its totient is φ = 8486276.

The previous prime is 16972541. The next prime is 16972559. The reversal of 16972556 is 65527961.

It is a super-3 number, since 3×16972556³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (16972559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2121566 + ... + 2121573.

It is an arithmetic number, because the mean of its divisors is an integer number (4950330).

Almost surely, 2^16972556 is an apocalyptic number.

It is an amenable number.

16972556 is a deficient number, since it is larger than the sum of its proper divisors (12729424).

16972556 is a wasteful number, since it uses less digits than its factorization.

16972556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4243143 (or 4243141 counting only the distinct ones).

The product of its digits is 113400, while the sum is 41.

The square root of 16972556 is about 4119.7762075142. The cubic root of 16972556 is about 256.9897193423.

The spelling of 16972556 in words is "sixteen million, nine hundred seventy-two thousand, five hundred fifty-six".