9640687 has 8 divisors (see below), whose sum is σ = 11252736. Its totient is φ = 8087352.

The previous prime is 9640667. The next prime is 9640693. The reversal of 9640687 is 7860469.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9640687 - 2¹⁹ = 9116399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9640627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14323 + ... + 14980.

It is an arithmetic number, because the mean of its divisors is an integer number (1406592).

Almost surely, 2^9640687 is an apocalyptic number.

9640687 is a deficient number, since it is larger than the sum of its proper divisors (1612049).

9640687 is a wasteful number, since it uses less digits than its factorization.

9640687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29357.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 9640687 is about 3104.9455711816. The cubic root of 9640687 is about 212.8315433554.

It can be divided in two parts, 964068 and 7, that multiplied together give a palindrome (6748476).

The spelling of 9640687 in words is "nine million, six hundred forty thousand, six hundred eighty-seven".