697393391 has 4 divisors (see below), whose sum is σ = 719889984. Its totient is φ = 674896800.

The previous prime is 697393357. The next prime is 697393429. The reversal of 697393391 is 193393796.

It is a happy number.

697393391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 697393391 - 2²⁶ = 630284527 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 (697393321) 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, 11248250 + ... + 11248311.

It is an arithmetic number, because the mean of its divisors is an integer number (179972496).

Almost surely, 2^697393391 is an apocalyptic number.

697393391 is a deficient number, since it is larger than the sum of its proper divisors (22496593).

697393391 is a wasteful number, since it uses less digits than its factorization.

697393391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22496592.

The product of its digits is 826686, while the sum is 50.

The square root of 697393391 is about 26408.2068872538. The cubic root of 697393391 is about 886.8005268501.

The spelling of 697393391 in words is "six hundred ninety-seven million, three hundred ninety-three thousand, three hundred ninety-one".