97491 has 4 divisors (see below), whose sum is σ = 129992. Its totient is φ = 64992.

The previous prime is 97463. The next prime is 97499. The reversal of 97491 is 19479.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 97491 - 2⁵ = 97459 is a prime.

It is a D-number.

It is a Duffinian number.

97491 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (97499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16246 + ... + 16251.

It is an arithmetic number, because the mean of its divisors is an integer number (32498).

2⁹⁷⁴⁹¹ is an apocalyptic number.

97491 is a deficient number, since it is larger than the sum of its proper divisors (32501).

97491 is a wasteful number, since it uses less digits than its factorization.

97491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32500.

The product of its digits is 2268, while the sum is 30.

The square root of 97491 is about 312.2354880535. The cubic root of 97491 is about 46.0244041899.

Subtracting from 97491 its sum of digits (30), we obtain a triangular number (97461 = T₄₄₁).

The spelling of 97491 in words is "ninety-seven thousand, four hundred ninety-one".