713121977 has 4 divisors (see below), whose sum is σ = 737712420. Its totient is φ = 688531536.

The previous prime is 713121971. The next prime is 713121991. The reversal of 713121977 is 779121317.

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 605356816 + 107765161 = 24604^2 + 10381^2 .

It is a cyclic number.

It is not a de Polignac number, because 713121977 - 2¹⁰ = 713120953 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 713121977.

It is not an unprimeable number, because it can be changed into a prime (713121971) 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, 12295178 + ... + 12295235.

It is an arithmetic number, because the mean of its divisors is an integer number (184428105).

Almost surely, 2^713121977 is an apocalyptic number.

It is an amenable number.

713121977 is a deficient number, since it is larger than the sum of its proper divisors (24590443).

713121977 is a wasteful number, since it uses less digits than its factorization.

713121977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24590442.

The product of its digits is 18522, while the sum is 38.

The square root of 713121977 is about 26704.3437852346. The cubic root of 713121977 is about 893.4178124083.

The spelling of 713121977 in words is "seven hundred thirteen million, one hundred twenty-one thousand, nine hundred seventy-seven".