677779139 has 4 divisors (see below), whose sum is σ = 678414240. Its totient is φ = 677144040.

The previous prime is 677779129. The next prime is 677779147. The reversal of 677779139 is 931977776.

It is a happy number.

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 677779139 - 2²⁴ = 661001923 is a prime.

It is a super-2 number, since 2×677779139² = 918769122527162642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (677779129) 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, 315947 + ... + 318084.

It is an arithmetic number, because the mean of its divisors is an integer number (169603560).

Almost surely, 2^677779139 is an apocalyptic number.

677779139 is a deficient number, since it is larger than the sum of its proper divisors (635101).

677779139 is a wasteful number, since it uses less digits than its factorization.

677779139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635100.

The product of its digits is 3500658, while the sum is 56.

The square root of 677779139 is about 26034.1917293393. The cubic root of 677779139 is about 878.4075621437.

The spelling of 677779139 in words is "six hundred seventy-seven million, seven hundred seventy-nine thousand, one hundred thirty-nine".