16897827979 has 16 divisors (see below), whose sum is σ = 17978630400. Its totient is φ = 15846326496.

The previous prime is 16897827959. The next prime is 16897827983. The reversal of 16897827979 is 97972879861.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16897827979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16897827959) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1920412 + ... + 1929190.

It is an arithmetic number, because the mean of its divisors is an integer number (1123664400).

Almost surely, 2^16897827979 is an apocalyptic number.

16897827979 is a deficient number, since it is larger than the sum of its proper divisors (1080802421).

16897827979 is a wasteful number, since it uses less digits than its factorization.

16897827979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10434.

The product of its digits is 192036096, while the sum is 73.

The spelling of 16897827979 in words is "sixteen billion, eight hundred ninety-seven million, eight hundred twenty-seven thousand, nine hundred seventy-nine".