697347157 has 8 divisors (see below), whose sum is σ = 795165336. Its totient is φ = 605839872.

The previous prime is 697347149. The next prime is 697347179. The reversal of 697347157 is 751743796.

It can be written as a sum of positive squares in 4 ways, for example, as 119377476 + 577969681 = 10926^2 + 24041^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 697347157 - 2³ = 697347149 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 697347157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (697347107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1577488 + ... + 1577929.

It is an arithmetic number, because the mean of its divisors is an integer number (99395667).

Almost surely, 2^697347157 is an apocalyptic number.

It is an amenable number.

697347157 is a deficient number, since it is larger than the sum of its proper divisors (97818179).

697347157 is a wasteful number, since it uses less digits than its factorization.

697347157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3155447.

The product of its digits is 1111320, while the sum is 49.

The square root of 697347157 is about 26407.3315009298. The cubic root of 697347157 is about 886.7809294740.

The spelling of 697347157 in words is "six hundred ninety-seven million, three hundred forty-seven thousand, one hundred fifty-seven".