97633681 has 4 divisors (see below), whose sum is σ = 97664292. Its totient is φ = 97603072.

The previous prime is 97633667. The next prime is 97633687. The reversal of 97633681 is 18633679.

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 1985281 + 95648400 = 1409^2 + 9780^2 .

It is a cyclic number.

It is not a de Polignac number, because 97633681 - 2⁷ = 97633553 is a prime.

It is a super-2 number, since 2×97633681² = 19064671331219522, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (97633687) 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, 9880 + ... + 17113.

It is an arithmetic number, because the mean of its divisors is an integer number (24416073).

Almost surely, 2^97633681 is an apocalyptic number.

It is an amenable number.

97633681 is a deficient number, since it is larger than the sum of its proper divisors (30611).

97633681 is a wasteful number, since it uses less digits than its factorization.

97633681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30610.

The product of its digits is 163296, while the sum is 43.

The square root of 97633681 is about 9880.9757109306. The cubic root of 97633681 is about 460.4684594366.

The spelling of 97633681 in words is "ninety-seven million, six hundred thirty-three thousand, six hundred eighty-one".