16977793 has 4 divisors (see below), whose sum is σ = 19403200. Its totient is φ = 14552388.

The previous prime is 16977791. The next prime is 16977809. The reversal of 16977793 is 39777961.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39777961 = 263 ⋅151247.

It is a cyclic number.

It is not a de Polignac number, because 16977793 - 2¹ = 16977791 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16977791) 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, 1212693 + ... + 1212706.

It is an arithmetic number, because the mean of its divisors is an integer number (4850800).

Almost surely, 2^16977793 is an apocalyptic number.

It is an amenable number.

16977793 is a deficient number, since it is larger than the sum of its proper divisors (2425407).

16977793 is an equidigital number, since it uses as much as digits as its factorization.

16977793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2425406.

The product of its digits is 500094, while the sum is 49.

The square root of 16977793 is about 4120.4117512695. The cubic root of 16977793 is about 257.0161486116.

The spelling of 16977793 in words is "sixteen million, nine hundred seventy-seven thousand, seven hundred ninety-three".