7942393 has 4 divisors (see below), whose sum is σ = 7974288. Its totient is φ = 7910500.

The previous prime is 7942387. The next prime is 7942411. The reversal of 7942393 is 3932497.

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, and also an emirpimes, since its reverse is a distinct semiprime: 3932497 = 1747 ⋅2251.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7942393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7942303) 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 3 ways as a sum of consecutive naturals, for example, 15571 + ... + 16072.

It is an arithmetic number, because the mean of its divisors is an integer number (1993572).

Almost surely, 2^7942393 is an apocalyptic number.

It is an amenable number.

7942393 is a deficient number, since it is larger than the sum of its proper divisors (31895).

7942393 is a wasteful number, since it uses less digits than its factorization.

7942393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31894.

The product of its digits is 40824, while the sum is 37.

The square root of 7942393 is about 2818.2251506933. The cubic root of 7942393 is about 199.5187847547.

The spelling of 7942393 in words is "seven million, nine hundred forty-two thousand, three hundred ninety-three".