97028521 has 4 divisors (see below), whose sum is σ = 97623952. Its totient is φ = 96433092.

The previous prime is 97028507. The next prime is 97028549. The reversal of 97028521 is 12582079.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 97028521 - 2¹¹ = 97026473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97028021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 297471 + ... + 297796.

It is an arithmetic number, because the mean of its divisors is an integer number (24405988).

Almost surely, 2^97028521 is an apocalyptic number.

It is an amenable number.

97028521 is a deficient number, since it is larger than the sum of its proper divisors (595431).

97028521 is a wasteful number, since it uses less digits than its factorization.

97028521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595430.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 97028521 is about 9850.3056297762. The cubic root of 97028521 is about 459.5151176133.

The spelling of 97028521 in words is "ninety-seven million, twenty-eight thousand, five hundred twenty-one".