97130881 has 8 divisors (see below), whose sum is σ = 98406440. Its totient is φ = 95862528.

The previous prime is 97130861. The next prime is 97130921. The reversal of 97130881 is 18803179.

It can be written as a sum of positive squares in 4 ways, for example, as 26419600 + 70711281 = 5140^2 + 8409^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 97130881 - 2¹¹ = 97128833 is a prime.

It is a super-2 number, since 2×97130881² = 18868816087672322, which contains 22 as substring.

It is the 9856-th Hogben number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 97130881.

It is not an unprimeable number, because it can be changed into a prime (97130861) by changing a digit.

It is a nontrivial repunit in base 9855.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28585 + ... + 31801.

It is an arithmetic number, because the mean of its divisors is an integer number (12300805).

Almost surely, 2^97130881 is an apocalyptic number.

It is an amenable number.

97130881 is a deficient number, since it is larger than the sum of its proper divisors (1275559).

97130881 is a wasteful number, since it uses less digits than its factorization.

97130881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3603.

The product of its (nonzero) digits is 12096, while the sum is 37.

The square root of 97130881 is about 9855.5000380498. The cubic root of 97130881 is about 459.6766489393.

The spelling of 97130881 in words is "ninety-seven million, one hundred thirty thousand, eight hundred eighty-one".