97660649 has 4 divisors (see below), whose sum is σ = 100300164. Its totient is φ = 95021136.

The previous prime is 97660639. The next prime is 97660681. The reversal of 97660649 is 94606679.

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 57274624 + 40386025 = 7568^2 + 6355^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97660649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97660639) 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, 1319702 + ... + 1319775.

It is an arithmetic number, because the mean of its divisors is an integer number (25075041).

Almost surely, 2^97660649 is an apocalyptic number.

It is an amenable number.

97660649 is a deficient number, since it is larger than the sum of its proper divisors (2639515).

97660649 is a wasteful number, since it uses less digits than its factorization.

97660649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2639514.

The product of its (nonzero) digits is 489888, while the sum is 47.

The square root of 97660649 is about 9882.3402592706. The cubic root of 97660649 is about 460.5108518095.

The spelling of 97660649 in words is "ninety-seven million, six hundred sixty thousand, six hundred forty-nine".