677791381 has 4 divisors (see below), whose sum is σ = 679638592. Its totient is φ = 675944172.

The previous prime is 677791319. The next prime is 677791441. The reversal of 677791381 is 183197776.

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.

It is a cyclic number.

It is not a de Polignac number, because 677791381 - 2¹⁷ = 677660309 is a prime.

It is a super-2 number, since 2×677791381² = 918802312315774322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (677791181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 923055 + ... + 923788.

It is an arithmetic number, because the mean of its divisors is an integer number (169909648).

Almost surely, 2^677791381 is an apocalyptic number.

It is an amenable number.

677791381 is a deficient number, since it is larger than the sum of its proper divisors (1847211).

677791381 is a wasteful number, since it uses less digits than its factorization.

677791381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1847210.

The product of its digits is 444528, while the sum is 49.

The square root of 677791381 is about 26034.4268421642. The cubic root of 677791381 is about 878.4128506908.

The spelling of 677791381 in words is "six hundred seventy-seven million, seven hundred ninety-one thousand, three hundred eighty-one".