97181312 has 16 divisors (see below), whose sum is σ = 193603650. Its totient is φ = 48590592.

The previous prime is 97181309. The next prime is 97181327. The reversal of 97181312 is 21318179.

It can be written as a sum of positive squares in only one way, i.e., 94167616 + 3013696 = 9704^2 + 1736^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 379487 + ... + 379742.

Almost surely, 2^97181312 is an apocalyptic number.

It is an amenable number.

97181312 is a deficient number, since it is larger than the sum of its proper divisors (96422338).

97181312 is an equidigital number, since it uses as much as digits as its factorization.

97181312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 759243 (or 759231 counting only the distinct ones).

The product of its digits is 3024, while the sum is 32.

The square root of 97181312 is about 9858.0582266489. The cubic root of 97181312 is about 459.7561909000.

The spelling of 97181312 in words is "ninety-seven million, one hundred eighty-one thousand, three hundred twelve".