677198091 has 4 divisors (see below), whose sum is σ = 902930792. Its totient is φ = 451465392.

The previous prime is 677198083. The next prime is 677198129. The reversal of 677198091 is 190891776.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 677198091 - 2³ = 677198083 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 677198091.

It is not an unprimeable number, because it can be changed into a prime (677198021) 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, 112866346 + ... + 112866351.

It is an arithmetic number, because the mean of its divisors is an integer number (225732698).

Almost surely, 2^677198091 is an apocalyptic number.

677198091 is a deficient number, since it is larger than the sum of its proper divisors (225732701).

677198091 is a wasteful number, since it uses less digits than its factorization.

677198091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225732700.

The product of its (nonzero) digits is 190512, while the sum is 48.

The square root of 677198091 is about 26023.0300118952. The cubic root of 677198091 is about 878.1564759866.

The spelling of 677198091 in words is "six hundred seventy-seven million, one hundred ninety-eight thousand, ninety-one".