97831481 has 16 divisors (see below), whose sum is σ = 115147008. Its totient is φ = 82118400.

The previous prime is 97831477. The next prime is 97831483. The reversal of 97831481 is 18413879.

It is a cyclic number.

It is not a de Polignac number, because 97831481 - 2² = 97831477 is a prime.

It is a super-2 number, since 2×97831481² = 19141997349306722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97831483) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4976 + ... + 14846.

It is an arithmetic number, because the mean of its divisors is an integer number (7196688).

Almost surely, 2^97831481 is an apocalyptic number.

It is an amenable number.

97831481 is a deficient number, since it is larger than the sum of its proper divisors (17315527).

97831481 is a wasteful number, since it uses less digits than its factorization.

97831481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9952.

The product of its digits is 48384, while the sum is 41.

The square root of 97831481 is about 9890.9797795769. The cubic root of 97831481 is about 460.7792101990.

The spelling of 97831481 in words is "ninety-seven million, eight hundred thirty-one thousand, four hundred eighty-one".