9361115721 has 6 divisors (see below), whose sum is σ = 13521611610. Its totient is φ = 6240743808.

The previous prime is 9361115683. The next prime is 9361115723. The reversal of 9361115721 is 1275111639.

It is a happy number.

9361115721 is a `hidden beast` number, since 9 + 3 + 611 + 15 + 7 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 5275988496 + 4085127225 = 72636^2 + 63915^2 .

It is not a de Polignac number, because 9361115721 - 2⁶ = 9361115657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9361115723) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 520061976 + ... + 520061993.

It is an arithmetic number, because the mean of its divisors is an integer number (2253601935).

Almost surely, 2^9361115721 is an apocalyptic number.

It is an amenable number.

9361115721 is a deficient number, since it is larger than the sum of its proper divisors (4160495889).

9361115721 is a wasteful number, since it uses less digits than its factorization.

9361115721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1040123975 (or 1040123972 counting only the distinct ones).

The product of its digits is 11340, while the sum is 36.

The square root of 9361115721 is about 96752.8589810141. The cubic root of 9361115721 is about 2107.5402196788.

The spelling of 9361115721 in words is "nine billion, three hundred sixty-one million, one hundred fifteen thousand, seven hundred twenty-one".