697885123921 has 8 divisors (see below), whose sum is σ = 742028981760. Its totient is φ = 654084798528.

The previous prime is 697885123909. The next prime is 697885123931. The reversal of 697885123921 is 129321588796.

697885123921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 697885123921 - 2²¹ = 697883026769 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 697885123921.

It is not an unprimeable number, because it can be changed into a prime (697885123931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85878921 + ... + 85887046.

It is an arithmetic number, because the mean of its divisors is an integer number (92753622720).

Almost surely, 2^697885123921 is an apocalyptic number.

It is an amenable number.

697885123921 is a deficient number, since it is larger than the sum of its proper divisors (44143857839).

697885123921 is a wasteful number, since it uses less digits than its factorization.

697885123921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171766223.

The product of its digits is 13063680, while the sum is 61.

The spelling of 697885123921 in words is "six hundred ninety-seven billion, eight hundred eighty-five million, one hundred twenty-three thousand, nine hundred twenty-one".