7291997 has 8 divisors (see below), whose sum is σ = 7930296. Its totient is φ = 6676992.

The previous prime is 7291981. The next prime is 7292011. The reversal of 7291997 is 7991927.

It can be written as a sum of positive squares in 4 ways, for example, as 5480281 + 1811716 = 2341^2 + 1346^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 7291997 - 2⁴ = 7291981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7291927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5168 + ... + 6425.

It is an arithmetic number, because the mean of its divisors is an integer number (991287).

Almost surely, 2^7291997 is an apocalyptic number.

It is an amenable number.

7291997 is a deficient number, since it is larger than the sum of its proper divisors (638299).

7291997 is a wasteful number, since it uses less digits than its factorization.

7291997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11647.

The product of its digits is 71442, while the sum is 44.

The square root of 7291997 is about 2700.3697894918. The cubic root of 7291997 is about 193.9168258612.

The spelling of 7291997 in words is "seven million, two hundred ninety-one thousand, nine hundred ninety-seven".