9690639 has 16 divisors (see below), whose sum is σ = 14810880. Its totient is φ = 5520960.

The previous prime is 9690623. The next prime is 9690641. The reversal of 9690639 is 9360969.

It is not a de Polignac number, because 9690639 - 2⁴ = 9690623 is a prime.

9690639 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 9690639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9690619) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11544 + ... + 12354.

It is an arithmetic number, because the mean of its divisors is an integer number (925680).

Almost surely, 2^9690639 is an apocalyptic number.

9690639 is a deficient number, since it is larger than the sum of its proper divisors (5120241).

9690639 is a wasteful number, since it uses less digits than its factorization.

9690639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1390.

The product of its (nonzero) digits is 78732, while the sum is 42.

The square root of 9690639 is about 3112.9791197501. The cubic root of 9690639 is about 213.1984968806.

The spelling of 9690639 in words is "nine million, six hundred ninety thousand, six hundred thirty-nine".