713665637 has 4 divisors (see below), whose sum is σ = 718211436. Its totient is φ = 709119840.

The previous prime is 713665621. The next prime is 713665681. The reversal of 713665637 is 736566317.

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 149793121 + 563872516 = 12239^2 + 23746^2 .

It is a cyclic number.

It is not a de Polignac number, because 713665637 - 2⁴ = 713665621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (713605637) 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, 2272664 + ... + 2272977.

It is an arithmetic number, because the mean of its divisors is an integer number (179552859).

Almost surely, 2^713665637 is an apocalyptic number.

It is an amenable number.

713665637 is a deficient number, since it is larger than the sum of its proper divisors (4545799).

713665637 is a wasteful number, since it uses less digits than its factorization.

713665637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4545798.

The product of its digits is 476280, while the sum is 44.

The square root of 713665637 is about 26714.5210887263. The cubic root of 713665637 is about 893.6447918801.

The spelling of 713665637 in words is "seven hundred thirteen million, six hundred sixty-five thousand, six hundred thirty-seven".