7640709 has 4 divisors (see below), whose sum is σ = 10187616. Its totient is φ = 5093804.

The previous prime is 7640707. The next prime is 7640723. The reversal of 7640709 is 9070467.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7640709 - 2¹ = 7640707 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7640709.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7640707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1273449 + ... + 1273454.

It is an arithmetic number, because the mean of its divisors is an integer number (2546904).

Almost surely, 2^7640709 is an apocalyptic number.

It is an amenable number.

7640709 is a deficient number, since it is larger than the sum of its proper divisors (2546907).

7640709 is a wasteful number, since it uses less digits than its factorization.

7640709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2546906.

The product of its (nonzero) digits is 10584, while the sum is 33.

The square root of 7640709 is about 2764.1832428405. The cubic root of 7640709 is about 196.9599324149.

The spelling of 7640709 in words is "seven million, six hundred forty thousand, seven hundred nine".