697512121 has 4 divisors (see below), whose sum is σ = 720012544. Its totient is φ = 675011700.

The previous prime is 697512119. The next prime is 697512149. The reversal of 697512121 is 121215796.

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 697512121 - 2¹ = 697512119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (697512181) 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, 11250165 + ... + 11250226.

It is an arithmetic number, because the mean of its divisors is an integer number (180003136).

Almost surely, 2^697512121 is an apocalyptic number.

It is an amenable number.

697512121 is a deficient number, since it is larger than the sum of its proper divisors (22500423).

697512121 is a wasteful number, since it uses less digits than its factorization.

697512121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22500422.

The product of its digits is 7560, while the sum is 34.

The square root of 697512121 is about 26410.4547670047. The cubic root of 697512121 is about 886.8508494052.

The spelling of 697512121 in words is "six hundred ninety-seven million, five hundred twelve thousand, one hundred twenty-one".