7957997 has 6 divisors (see below), whose sum is σ = 8180298. Its totient is φ = 7741584.

The previous prime is 7957991. The next prime is 7958009. The reversal of 7957997 is 7997597.

It can be written as a sum of positive squares in 3 ways, for example, as 5248681 + 2709316 = 2291^2 + 1646^2 .

It is not a de Polignac number, because 7957997 - 2¹² = 7953901 is a prime.

It is a Duffinian number.

It is a congruent 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 5 ways as a sum of consecutive naturals, for example, 1538 + ... + 4275.

It is an arithmetic number, because the mean of its divisors is an integer number (1363383).

Almost surely, 2^7957997 is an apocalyptic number.

It is an amenable number.

7957997 is a deficient number, since it is larger than the sum of its proper divisors (222301).

7957997 is an equidigital number, since it uses as much as digits as its factorization.

7957997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5887 (or 5850 counting only the distinct ones).

The product of its digits is 1250235, while the sum is 53.

The square root of 7957997 is about 2820.9922013363. The cubic root of 7957997 is about 199.6493606194.

The spelling of 7957997 in words is "seven million, nine hundred fifty-seven thousand, nine hundred ninety-seven".