97444591 has 4 divisors (see below), whose sum is σ = 97720992. Its totient is φ = 97168192.

The previous prime is 97444549. The next prime is 97444601. The reversal of 97444591 is 19544479.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19544479 = 149 ⋅131171.

It is not a de Polignac number, because 97444591 - 2⁹ = 97444079 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 (97444531) 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, 137671 + ... + 138376.

It is an arithmetic number, because the mean of its divisors is an integer number (24430248).

Almost surely, 2^97444591 is an apocalyptic number.

97444591 is a deficient number, since it is larger than the sum of its proper divisors (276401).

97444591 is a wasteful number, since it uses less digits than its factorization.

97444591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276400.

The product of its digits is 181440, while the sum is 43.

The square root of 97444591 is about 9871.4026865487. The cubic root of 97444591 is about 460.1709997519.

The spelling of 97444591 in words is "ninety-seven million, four hundred forty-four thousand, five hundred ninety-one".