9721250097 has 32 divisors (see below), whose sum is σ = 14854291200. Its totient is φ = 5602037760.

The previous prime is 9721250053. The next prime is 9721250111. The reversal of 9721250097 is 7900521279.

It is not a de Polignac number, because 9721250097 - 2⁷ = 9721249969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9721250047) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 95097 + ... + 168777.

It is an arithmetic number, because the mean of its divisors is an integer number (464196600).

Almost surely, 2^9721250097 is an apocalyptic number.

It is an amenable number.

9721250097 is a deficient number, since it is larger than the sum of its proper divisors (5133041103).

9721250097 is a wasteful number, since it uses less digits than its factorization.

9721250097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73913.

The product of its (nonzero) digits is 79380, while the sum is 42.

The square root of 9721250097 is about 98596.4000204876. The cubic root of 9721250097 is about 2134.2274697525.

The spelling of 9721250097 in words is "nine billion, seven hundred twenty-one million, two hundred fifty thousand, ninety-seven".