331187695264969 has 3 divisors (see below), whose sum is σ = 331187713463533. Its totient is φ = 331187677066406.

The previous prime is 331187695264963. The next prime is 331187695265057. The reversal of 331187695264969 is 969462596781133.

The square root of 331187695264969 is 18198563.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a de Polignac number, because none of the positive numbers 2^k-331187695264969 is a prime.

It is a super-2 number, since 2×331187695264969² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331187695264963) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 9099282 + ... + 27297844.

Almost surely, 2^{331187695264969} is an apocalyptic number.

331187695264969 is the 18198563-rd square number.

331187695264969 is the 9099282-nd centered octagonal number.

It is an amenable number.

331187695264969 is a deficient number, since it is larger than the sum of its proper divisors (18198564).

331187695264969 is an frugal number, since it uses more digits than its factorization.

331187695264969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36397126 (or 18198563 counting only the distinct ones).

The product of its digits is 3174474240, while the sum is 79.

The spelling of 331187695264969 in words is "three hundred thirty-one trillion, one hundred eighty-seven billion, six hundred ninety-five million, two hundred sixty-four thousand, nine hundred sixty-nine".