7971497 has 4 divisors (see below), whose sum is σ = 8044740. Its totient is φ = 7898256.

The previous prime is 7971493. The next prime is 7971499. The reversal of 7971497 is 7941797.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7941797 = 31 ⋅256187.

It can be written as a sum of positive squares in 2 ways, for example, as 5851561 + 2119936 = 2419^2 + 1456^2 .

It is a cyclic number.

It is not a de Polignac number, because 7971497 - 2² = 7971493 is a prime.

It is a super-3 number, since 3×7971497³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (7971493) 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, 36458 + ... + 36675.

It is an arithmetic number, because the mean of its divisors is an integer number (2011185).

Almost surely, 2^7971497 is an apocalyptic number.

It is an amenable number.

7971497 is a deficient number, since it is larger than the sum of its proper divisors (73243).

7971497 is a wasteful number, since it uses less digits than its factorization.

7971497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73242.

The product of its digits is 111132, while the sum is 44.

The square root of 7971497 is about 2823.3839625527. The cubic root of 7971497 is about 199.7621923497.

The spelling of 7971497 in words is "seven million, nine hundred seventy-one thousand, four hundred ninety-seven".