97544431 has 4 divisors (see below), whose sum is σ = 97692664. Its totient is φ = 97396200.

The previous prime is 97544417. The next prime is 97544441. The reversal of 97544431 is 13444579.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13444579 = 37 ⋅363367.

It is a cyclic number.

It is not a de Polignac number, because 97544431 - 2¹³ = 97536239 is a prime.

It is a super-2 number, since 2×97544431² = 19029832038227522, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97544441) 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, 73125 + ... + 74446.

It is an arithmetic number, because the mean of its divisors is an integer number (24423166).

Almost surely, 2^97544431 is an apocalyptic number.

97544431 is a deficient number, since it is larger than the sum of its proper divisors (148233).

97544431 is a wasteful number, since it uses less digits than its factorization.

97544431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148232.

The product of its digits is 60480, while the sum is 37.

The square root of 97544431 is about 9876.4584239493. The cubic root of 97544431 is about 460.3281071231.

The spelling of 97544431 in words is "ninety-seven million, five hundred forty-four thousand, four hundred thirty-one".