7917331 has 2 divisors, whose sum is σ = 7917332. Its totient is φ = 7917330.

The previous prime is 7917311. The next prime is 7917337. The reversal of 7917331 is 1337197.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7917331 - 2¹¹ = 7915283 is a prime.

It is a super-2 number, since 2×7917331² = 125368260327122, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 7917293 and 7917302.

It is not a weakly prime, because it can be changed into another prime (7917337) 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 as a sum of consecutive naturals, namely, 3958665 + 3958666.

It is an arithmetic number, because the mean of its divisors is an integer number (3958666).

Almost surely, 2^7917331 is an apocalyptic number.

7917331 is a deficient number, since it is larger than the sum of its proper divisors (1).

7917331 is an equidigital number, since it uses as much as digits as its factorization.

7917331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3969, while the sum is 31.

The square root of 7917331 is about 2813.7752220105. The cubic root of 7917331 is about 199.3087049756.

The spelling of 7917331 in words is "seven million, nine hundred seventeen thousand, three hundred thirty-one".