97097184581 has 4 divisors (see below), whose sum is σ = 102808783692. Its totient is φ = 91385585472.

The previous prime is 97097184577. The next prime is 97097184599. The reversal of 97097184581 is 18548179079.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 34929741025 + 62167443556 = 186895^2 + 249334^2 .

It is a cyclic number.

It is not a de Polignac number, because 97097184581 - 2² = 97097184577 is a prime.

It is a super-2 number, since 2×97097184581² (a number of 23 digits) contains 22 as substring.

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 97097184581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97097184571) 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, 2855799530 + ... + 2855799563.

It is an arithmetic number, because the mean of its divisors is an integer number (25702195923).

Almost surely, 2^97097184581 is an apocalyptic number.

It is an amenable number.

97097184581 is a deficient number, since it is larger than the sum of its proper divisors (5711599111).

97097184581 is a wasteful number, since it uses less digits than its factorization.

97097184581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5711599110.

The product of its (nonzero) digits is 5080320, while the sum is 59.

The spelling of 97097184581 in words is "ninety-seven billion, ninety-seven million, one hundred eighty-four thousand, five hundred eighty-one".