97307187481 has 9 divisors (see below), whose sum is σ = 113196615381. Its totient is φ = 83404289052.

The previous prime is 97307187431. The next prime is 97307187487. The reversal of 97307187481 is 18478170379.

It is a happy number.

The square root of 97307187481 is 311941.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 97307187481 - 2⁹ = 97307186969 is a prime.

It is a super-2 number, since 2×97307187481² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97307187487) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2161306 + ... + 2205868.

It is an arithmetic number, because the mean of its divisors is an integer number (12577401709).

Almost surely, 2^97307187481 is an apocalyptic number.

97307187481 is the 311941-st square number.

97307187481 is the 155971-st centered octagonal number.

It is an amenable number.

97307187481 is a deficient number, since it is larger than the sum of its proper divisors (15889427900).

97307187481 is an frugal number, since it uses more digits than its factorization.

97307187481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89140 (or 44570 counting only the distinct ones).

The product of its (nonzero) digits is 2370816, while the sum is 55.

The spelling of 97307187481 in words is "ninety-seven billion, three hundred seven million, one hundred eighty-seven thousand, four hundred eighty-one".