16956993 has 8 divisors (see below), whose sum is σ = 22829248. Its totient is φ = 11194704.

The previous prime is 16956977. The next prime is 16957009. The reversal of 16956993 is 39965961.

It is an interprime number because it is at equal distance from previous prime (16956977) and next prime (16957009).

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

It is not a de Polignac number, because 16956993 - 2⁴ = 16956977 is a prime.

It is a super-2 number, since 2×16956993² = 575079223204098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16956923) 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, 27130 + ... + 27747.

It is an arithmetic number, because the mean of its divisors is an integer number (2853656).

Almost surely, 2^16956993 is an apocalyptic number.

It is an amenable number.

16956993 is a deficient number, since it is larger than the sum of its proper divisors (5872255).

16956993 is a wasteful number, since it uses less digits than its factorization.

16956993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54983.

The product of its digits is 393660, while the sum is 48.

The square root of 16956993 is about 4117.8869581376. The cubic root of 16956993 is about 256.9111463392.

The spelling of 16956993 in words is "sixteen million, nine hundred fifty-six thousand, nine hundred ninety-three".