97591 has 4 divisors (see below), whose sum is σ = 105112. Its totient is φ = 90072.

The previous prime is 97583. The next prime is 97607. The reversal of 97591 is 19579.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19579 = 7 ⋅2797.

It is a cyclic number.

It is not a de Polignac number, because 97591 - 2³ = 97583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97501) 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, 3741 + ... + 3766.

It is an arithmetic number, because the mean of its divisors is an integer number (26278).

2⁹⁷⁵⁹¹ is an apocalyptic number.

97591 is a deficient number, since it is larger than the sum of its proper divisors (7521).

97591 is a wasteful number, since it uses less digits than its factorization.

97591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7520.

The product of its digits is 2835, while the sum is 31.

The square root of 97591 is about 312.3955825552. The cubic root of 97591 is about 46.0401351042.

The spelling of 97591 in words is "ninety-seven thousand, five hundred ninety-one".