7640743 has 8 divisors (see below), whose sum is σ = 8513280. Its totient is φ = 6797880.

The previous prime is 7640723. The next prime is 7640749. The reversal of 7640743 is 3470467.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7640743 - 2²¹ = 5543591 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7640749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6873 + ... + 7906.

It is an arithmetic number, because the mean of its divisors is an integer number (1064160).

Almost surely, 2^7640743 is an apocalyptic number.

7640743 is a deficient number, since it is larger than the sum of its proper divisors (872537).

7640743 is a wasteful number, since it uses less digits than its factorization.

7640743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14837.

The product of its (nonzero) digits is 14112, while the sum is 31.

The square root of 7640743 is about 2764.1893929324. The cubic root of 7640743 is about 196.9602245617.

The spelling of 7640743 in words is "seven million, six hundred forty thousand, seven hundred forty-three".