677148191 has 4 divisors (see below), whose sum is σ = 680105400. Its totient is φ = 674190984.

The previous prime is 677148167. The next prime is 677148203. The reversal of 677148191 is 191841776.

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

It is a cyclic number.

It is not a de Polignac number, because 677148191 - 2⁶ = 677148127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (677148151) 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, 1478261 + ... + 1478718.

It is an arithmetic number, because the mean of its divisors is an integer number (170026350).

Almost surely, 2^677148191 is an apocalyptic number.

677148191 is a deficient number, since it is larger than the sum of its proper divisors (2957209).

677148191 is a wasteful number, since it uses less digits than its factorization.

677148191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2957208.

The product of its digits is 84672, while the sum is 44.

The square root of 677148191 is about 26022.0712280940. The cubic root of 677148191 is about 878.1349061854.

The spelling of 677148191 in words is "six hundred seventy-seven million, one hundred forty-eight thousand, one hundred ninety-one".