7657993 has 4 divisors (see below), whose sum is σ = 8752000. Its totient is φ = 6563988.

The previous prime is 7657987. The next prime is 7657997. The reversal of 7657993 is 3997567.

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 7657993 - 2¹³ = 7649801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7657997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 546993 + ... + 547006.

It is an arithmetic number, because the mean of its divisors is an integer number (2188000).

Almost surely, 2^7657993 is an apocalyptic number.

It is an amenable number.

7657993 is a deficient number, since it is larger than the sum of its proper divisors (1094007).

7657993 is a wasteful number, since it uses less digits than its factorization.

7657993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1094006.

The product of its digits is 357210, while the sum is 46.

The square root of 7657993 is about 2767.3078975784. The cubic root of 7657993 is about 197.1083345146.

The spelling of 7657993 in words is "seven million, six hundred fifty-seven thousand, nine hundred ninety-three".