677443939 has 4 divisors (see below), whose sum is σ = 677640400. Its totient is φ = 677247480.

The previous prime is 677443891. The next prime is 677443967. The reversal of 677443939 is 939344776.

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 677443939 - 2²¹ = 675346787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (677443339) 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, 92964 + ... + 99985.

It is an arithmetic number, because the mean of its divisors is an integer number (169410100).

Almost surely, 2^677443939 is an apocalyptic number.

677443939 is a deficient number, since it is larger than the sum of its proper divisors (196461).

677443939 is a wasteful number, since it uses less digits than its factorization.

677443939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196460.

The product of its digits is 3429216, while the sum is 52.

The square root of 677443939 is about 26027.7532453341. The cubic root of 677443939 is about 878.2627309095.

The spelling of 677443939 in words is "six hundred seventy-seven million, four hundred forty-three thousand, nine hundred thirty-nine".