97681251 has 16 divisors (see below), whose sum is σ = 137871360. Its totient is φ = 61410720.

The previous prime is 97681249. The next prime is 97681267. The reversal of 97681251 is 15218679.

It is not a de Polignac number, because 97681251 - 2¹ = 97681249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (97681211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9315 + ... + 16796.

It is an arithmetic number, because the mean of its divisors is an integer number (8616960).

Almost surely, 2^97681251 is an apocalyptic number.

97681251 is a deficient number, since it is larger than the sum of its proper divisors (40190109).

97681251 is a wasteful number, since it uses less digits than its factorization.

97681251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26186.

The product of its digits is 30240, while the sum is 39.

The square root of 97681251 is about 9883.3825687363. The cubic root of 97681251 is about 460.5432318848.

The spelling of 97681251 in words is "ninety-seven million, six hundred eighty-one thousand, two hundred fifty-one".