7971965 has 8 divisors (see below), whose sum is σ = 9697848. Its totient is φ = 6289920.

The previous prime is 7971959. The next prime is 7971973. The reversal of 7971965 is 5691797.

It can be written as a sum of positive squares in 4 ways, for example, as 8281 + 7963684 = 91^2 + 2822^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7971965 - 2⁸ = 7971709 is a prime.

It is a super-2 number, since 2×7971965² = 127104451922450, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10556 + ... + 11285.

It is an arithmetic number, because the mean of its divisors is an integer number (1212231).

Almost surely, 2^7971965 is an apocalyptic number.

It is an amenable number.

7971965 is a deficient number, since it is larger than the sum of its proper divisors (1725883).

7971965 is a wasteful number, since it uses less digits than its factorization.

7971965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21919.

The product of its digits is 119070, while the sum is 44.

The square root of 7971965 is about 2823.4668406057. The cubic root of 7971965 is about 199.7661015642.

The spelling of 7971965 in words is "seven million, nine hundred seventy-one thousand, nine hundred sixty-five".