691713023 has 2 divisors, whose sum is σ = 691713024. Its totient is φ = 691713022.

The previous prime is 691712999. The next prime is 691713041. The reversal of 691713023 is 320317196.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 691713023 - 2⁸ = 691712767 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (691713223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345856511 + 345856512.

It is an arithmetic number, because the mean of its divisors is an integer number (345856512).

Almost surely, 2^691713023 is an apocalyptic number.

691713023 is a deficient number, since it is larger than the sum of its proper divisors (1).

691713023 is an equidigital number, since it uses as much as digits as its factorization.

691713023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 691713023 is about 26300.4376959776. The cubic root of 691713023 is about 884.3862547532.

The spelling of 691713023 in words is "six hundred ninety-one million, seven hundred thirteen thousand, twenty-three".