697952221129 has 16 divisors (see below), whose sum is σ = 716616331200. Its totient is φ = 679402031616.

The previous prime is 697952221111. The next prime is 697952221157. The reversal of 697952221129 is 921122259796.

It is a cyclic number.

It is not a de Polignac number, because 697952221129 - 2¹⁵ = 697952188361 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 697952221129.

It is not an unprimeable number, because it can be changed into a prime (697952221199) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18159957 + ... + 18198349.

It is an arithmetic number, because the mean of its divisors is an integer number (44788520700).

Almost surely, 2^697952221129 is an apocalyptic number.

It is an amenable number.

697952221129 is a deficient number, since it is larger than the sum of its proper divisors (18664110071).

697952221129 is a wasteful number, since it uses less digits than its factorization.

697952221129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39864.

The product of its digits is 2449440, while the sum is 55.

The spelling of 697952221129 in words is "six hundred ninety-seven billion, nine hundred fifty-two million, two hundred twenty-one thousand, one hundred twenty-nine".