97545091 has 4 divisors (see below), whose sum is σ = 111480112. Its totient is φ = 83610072.

The previous prime is 97545079. The next prime is 97545101. The reversal of 97545091 is 19054579.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19054579 = 877 ⋅21727.

It is not a de Polignac number, because 97545091 - 2²¹ = 95447939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97545011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6967500 + ... + 6967513.

It is an arithmetic number, because the mean of its divisors is an integer number (27870028).

Almost surely, 2^97545091 is an apocalyptic number.

97545091 is a deficient number, since it is larger than the sum of its proper divisors (13935021).

97545091 is a wasteful number, since it uses less digits than its factorization.

97545091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13935020.

The product of its (nonzero) digits is 56700, while the sum is 40.

The square root of 97545091 is about 9876.4918366797. The cubic root of 97545091 is about 460.3291453367.

The spelling of 97545091 in words is "ninety-seven million, five hundred forty-five thousand, ninety-one".