691613713 has 4 divisors (see below), whose sum is σ = 790415680. Its totient is φ = 592811748.

The previous prime is 691613711. The next prime is 691613717. The reversal of 691613713 is 317316196.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 691613713 - 2¹ = 691613711 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (691613711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49400973 + ... + 49400986.

It is an arithmetic number, because the mean of its divisors is an integer number (197603920).

Almost surely, 2^691613713 is an apocalyptic number.

It is an amenable number.

691613713 is a deficient number, since it is larger than the sum of its proper divisors (98801967).

691613713 is an equidigital number, since it uses as much as digits as its factorization.

691613713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98801966.

The product of its digits is 20412, while the sum is 37.

The square root of 691613713 is about 26298.5496368146. The cubic root of 691613713 is about 884.3439286249.

The spelling of 691613713 in words is "six hundred ninety-one million, six hundred thirteen thousand, seven hundred thirteen".