691341724807 has 2 divisors, whose sum is σ = 691341724808. Its totient is φ = 691341724806.

The previous prime is 691341724771. The next prime is 691341724817. The reversal of 691341724807 is 708427143196.

It is a happy number.

691341724807 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 691341724807 - 2⁷ = 691341724679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (691341724817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345670862403 + 345670862404.

It is an arithmetic number, because the mean of its divisors is an integer number (345670862404).

Almost surely, 2^691341724807 is an apocalyptic number.

691341724807 is a deficient number, since it is larger than the sum of its proper divisors (1).

691341724807 is an equidigital number, since it uses as much as digits as its factorization.

691341724807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2032128, while the sum is 52.

The spelling of 691341724807 in words is "six hundred ninety-one billion, three hundred forty-one million, seven hundred twenty-four thousand, eight hundred seven".