7973997 has 4 divisors (see below), whose sum is σ = 10632000. Its totient is φ = 5315996.

The previous prime is 7973971. The next prime is 7974017. The reversal of 7973997 is 7993797.

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 7973997 - 2⁸ = 7973741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7975997) 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, 1328997 + ... + 1329002.

It is an arithmetic number, because the mean of its divisors is an integer number (2658000).

Almost surely, 2^7973997 is an apocalyptic number.

It is an amenable number.

7973997 is a deficient number, since it is larger than the sum of its proper divisors (2658003).

7973997 is a wasteful number, since it uses less digits than its factorization.

7973997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2658002.

The product of its digits is 750141, while the sum is 51.

The square root of 7973997 is about 2823.8266589860. The cubic root of 7973997 is about 199.7830731321.

The spelling of 7973997 in words is "seven million, nine hundred seventy-three thousand, nine hundred ninety-seven".