97668381 has 16 divisors (see below), whose sum is σ = 134241408. Its totient is φ = 63134400.

The previous prime is 97668343. The next prime is 97668401. The reversal of 97668381 is 18386679.

It is not a de Polignac number, because 97668381 - 2²² = 93474077 is a prime.

It is a super-2 number, since 2×97668381² = 19078225294322322, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 97668381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97668881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9235 + ... + 16751.

It is an arithmetic number, because the mean of its divisors is an integer number (8390088).

Almost surely, 2^97668381 is an apocalyptic number.

It is an amenable number.

97668381 is a deficient number, since it is larger than the sum of its proper divisors (36573027).

97668381 is a wasteful number, since it uses less digits than its factorization.

97668381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7652.

The product of its digits is 435456, while the sum is 48.

The square root of 97668381 is about 9882.7314544108. The cubic root of 97668381 is about 460.5230046946.

The spelling of 97668381 in words is "ninety-seven million, six hundred sixty-eight thousand, three hundred eighty-one".