97665481 has 4 divisors (see below), whose sum is σ = 97973892. Its totient is φ = 97357072.

The previous prime is 97665479. The next prime is 97665497. The reversal of 97665481 is 18456679.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18456679 = 17 ⋅1085687.

It can be written as a sum of positive squares in 2 ways, for example, as 25160256 + 72505225 = 5016^2 + 8515^2 .

It is a cyclic number.

It is not a de Polignac number, because 97665481 - 2¹ = 97665479 is a prime.

It is a super-2 number, since 2×97665481² = 19077092357922722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97665181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153730 + ... + 154363.

It is an arithmetic number, because the mean of its divisors is an integer number (24493473).

Almost surely, 2^97665481 is an apocalyptic number.

It is an amenable number.

97665481 is a deficient number, since it is larger than the sum of its proper divisors (308411).

97665481 is a wasteful number, since it uses less digits than its factorization.

97665481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308410.

The product of its digits is 362880, while the sum is 46.

The square root of 97665481 is about 9882.5847327508. The cubic root of 97665481 is about 460.5184466520.

The spelling of 97665481 in words is "ninety-seven million, six hundred sixty-five thousand, four hundred eighty-one".