9964657 has 4 divisors (see below), whose sum is σ = 9987300. Its totient is φ = 9942016.

The previous prime is 9964651. The next prime is 9964667. The reversal of 9964657 is 7564699.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7564699 = 941 ⋅8039.

It can be written as a sum of positive squares in 2 ways, for example, as 8071281 + 1893376 = 2841^2 + 1376^2 .

It is a cyclic number.

It is not a de Polignac number, because 9964657 - 2²³ = 1576049 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9964651) 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, 10648 + ... + 11545.

It is an arithmetic number, because the mean of its divisors is an integer number (2496825).

Almost surely, 2^9964657 is an apocalyptic number.

It is an amenable number.

9964657 is a deficient number, since it is larger than the sum of its proper divisors (22643).

9964657 is a wasteful number, since it uses less digits than its factorization.

9964657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22642.

The product of its digits is 408240, while the sum is 46.

The square root of 9964657 is about 3156.6844948458. The cubic root of 9964657 is about 215.1893554456.

The spelling of 9964657 in words is "nine million, nine hundred sixty-four thousand, six hundred fifty-seven".