7640723 has 2 divisors, whose sum is σ = 7640724. Its totient is φ = 7640722.

The previous prime is 7640707. The next prime is 7640749. The reversal of 7640723 is 3270467.

7640723 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7640723 - 2⁴ = 7640707 is a prime.

It is a Sophie Germain prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (7640023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3820361 + 3820362.

It is an arithmetic number, because the mean of its divisors is an integer number (3820362).

Almost surely, 2^7640723 is an apocalyptic number.

7640723 is a deficient number, since it is larger than the sum of its proper divisors (1).

7640723 is an equidigital number, since it uses as much as digits as its factorization.

7640723 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 29.

The square root of 7640723 is about 2764.1857752329. The cubic root of 7640723 is about 196.9600527107.

The spelling of 7640723 in words is "seven million, six hundred forty thousand, seven hundred twenty-three".