7640783 has 4 divisors (see below), whose sum is σ = 7647480. Its totient is φ = 7634088.

The previous prime is 7640777. The next prime is 7640821. The reversal of 7640783 is 3870467.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 7640783 - 2⁴ = 7640767 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 (7640723) 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, 1160 + ... + 4077.

It is an arithmetic number, because the mean of its divisors is an integer number (1911870).

Almost surely, 2^7640783 is an apocalyptic number.

7640783 is a deficient number, since it is larger than the sum of its proper divisors (6697).

7640783 is a wasteful number, since it uses less digits than its factorization.

7640783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6696.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 7640783 is about 2764.1966283172. The cubic root of 7640783 is about 196.9605682628.

The spelling of 7640783 in words is "seven million, six hundred forty thousand, seven hundred eighty-three".