697442121 has 12 divisors (see below), whose sum is σ = 1007980272. Its totient is φ = 464701176.

The previous prime is 697442117. The next prime is 697442131. The reversal of 697442121 is 121244796.

It is a happy number.

697442121 is a `hidden beast` number, since 6 + 97 + 442 + 121 = 666.

It is not a de Polignac number, because 697442121 - 2² = 697442117 is a prime.

It is not an unprimeable number, because it can be changed into a prime (697442131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3951 + ... + 37556.

It is an arithmetic number, because the mean of its divisors is an integer number (83998356).

Almost surely, 2^697442121 is an apocalyptic number.

It is an amenable number.

697442121 is a deficient number, since it is larger than the sum of its proper divisors (310538151).

697442121 is a wasteful number, since it uses less digits than its factorization.

697442121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43380 (or 43377 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 697442121 is about 26409.1295009889. The cubic root of 697442121 is about 886.8211812774.

The spelling of 697442121 in words is "six hundred ninety-seven million, four hundred forty-two thousand, one hundred twenty-one".