7957993 has 4 divisors (see below), whose sum is σ = 8127360. Its totient is φ = 7788628.

The previous prime is 7957991. The next prime is 7958009. The reversal of 7957993 is 3997597.

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 7957993 - 2¹ = 7957991 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7957991) 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, 84613 + ... + 84706.

It is an arithmetic number, because the mean of its divisors is an integer number (2031840).

Almost surely, 2^7957993 is an apocalyptic number.

It is an amenable number.

7957993 is a deficient number, since it is larger than the sum of its proper divisors (169367).

7957993 is a wasteful number, since it uses less digits than its factorization.

7957993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169366.

The product of its digits is 535815, while the sum is 49.

The square root of 7957993 is about 2820.9914923658. The cubic root of 7957993 is about 199.6493271689.

The spelling of 7957993 in words is "seven million, nine hundred fifty-seven thousand, nine hundred ninety-three".