97091521 has 8 divisors (see below), whose sum is σ = 99617760. Its totient is φ = 94594752.

The previous prime is 97091483. The next prime is 97091531. The reversal of 97091521 is 12519079.

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

It is a cyclic number.

It is not a de Polignac number, because 97091521 - 2²¹ = 94994369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97091531) 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, 615 + ... + 13948.

It is an arithmetic number, because the mean of its divisors is an integer number (12452220).

Almost surely, 2^97091521 is an apocalyptic number.

It is an amenable number.

97091521 is a deficient number, since it is larger than the sum of its proper divisors (2526239).

97091521 is a wasteful number, since it uses less digits than its factorization.

97091521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14735.

The product of its (nonzero) digits is 5670, while the sum is 34.

The square root of 97091521 is about 9853.5029811738. The cubic root of 97091521 is about 459.6145495082.

The spelling of 97091521 in words is "ninety-seven million, ninety-one thousand, five hundred twenty-one".