16893971 has 4 divisors (see below), whose sum is σ = 17887752. Its totient is φ = 15900192.

The previous prime is 16893959. The next prime is 16893991. The reversal of 16893971 is 17939861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17939861 = 463 ⋅38747.

It is a cyclic number.

It is not a de Polignac number, because 16893971 - 2²² = 12699667 is a prime.

It is a super-2 number, since 2×16893971² = 570812512297682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16893901) 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, 496865 + ... + 496898.

It is an arithmetic number, because the mean of its divisors is an integer number (4471938).

Almost surely, 2^16893971 is an apocalyptic number.

16893971 is a deficient number, since it is larger than the sum of its proper divisors (993781).

16893971 is an equidigital number, since it uses as much as digits as its factorization.

16893971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 993780.

The product of its digits is 81648, while the sum is 44.

The square root of 16893971 is about 4110.2276092693. The cubic root of 16893971 is about 256.5924743863.

The spelling of 16893971 in words is "sixteen million, eight hundred ninety-three thousand, nine hundred seventy-one".