677883809 has 4 divisors (see below), whose sum is σ = 682832004. Its totient is φ = 672935616.

The previous prime is 677883797. The next prime is 677883889. The reversal of 677883809 is 908388776.

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

It can be written as a sum of positive squares in 2 ways, for example, as 544989025 + 132894784 = 23345^2 + 11528^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-677883809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (677883889) 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, 2473892 + ... + 2474165.

It is an arithmetic number, because the mean of its divisors is an integer number (170708001).

Almost surely, 2^677883809 is an apocalyptic number.

It is an amenable number.

677883809 is a deficient number, since it is larger than the sum of its proper divisors (4948195).

677883809 is a wasteful number, since it uses less digits than its factorization.

677883809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4948194.

The product of its (nonzero) digits is 4064256, while the sum is 56.

The square root of 677883809 is about 26036.2018927493. The cubic root of 677883809 is about 878.4527775547.

The spelling of 677883809 in words is "six hundred seventy-seven million, eight hundred eighty-three thousand, eight hundred nine".