97289881 has 4 divisors (see below), whose sum is σ = 104773732. Its totient is φ = 89806032.

The previous prime is 97289831. The next prime is 97289887. The reversal of 97289881 is 18898279.

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 12355225 + 84934656 = 3515^2 + 9216^2 .

It is a cyclic number.

It is not a de Polignac number, because 97289881 - 2¹¹ = 97287833 is a prime.

It is a super-2 number, since 2×97289881² = 18930641889988322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97289887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3741906 + ... + 3741931.

It is an arithmetic number, because the mean of its divisors is an integer number (26193433).

Almost surely, 2^97289881 is an apocalyptic number.

It is an amenable number.

97289881 is a deficient number, since it is larger than the sum of its proper divisors (7483851).

97289881 is a wasteful number, since it uses less digits than its factorization.

97289881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7483850.

The product of its digits is 580608, while the sum is 52.

The square root of 97289881 is about 9863.5633013633. The cubic root of 97289881 is about 459.9273372939.

The spelling of 97289881 in words is "ninety-seven million, two hundred eighty-nine thousand, eight hundred eighty-one".