11640739 has 4 divisors (see below), whose sum is σ = 12699000. Its totient is φ = 10582480.

The previous prime is 11640731. The next prime is 11640763. The reversal of 11640739 is 93704611.

It is a happy number.

11640739 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11640739 - 2³ = 11640731 is a prime.

It is a super-2 number, since 2×11640739² = 271013608932242, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11640739.

It is not an unprimeable number, because it can be changed into a prime (11640731) 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, 529114 + ... + 529135.

It is an arithmetic number, because the mean of its divisors is an integer number (3174750).

Almost surely, 2^11640739 is an apocalyptic number.

11640739 is a deficient number, since it is larger than the sum of its proper divisors (1058261).

11640739 is a wasteful number, since it uses less digits than its factorization.

11640739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1058260.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 11640739 is about 3411.8527224955. The cubic root of 11640739 is about 226.6349323604.

The spelling of 11640739 in words is "eleven million, six hundred forty thousand, seven hundred thirty-nine".