8130391 has 2 divisors, whose sum is σ = 8130392. Its totient is φ = 8130390.

The previous prime is 8130373. The next prime is 8130427. The reversal of 8130391 is 1930318.

8130391 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8130391 - 2¹⁷ = 7999319 is a prime.

It is a super-2 number, since 2×8130391² = 132206515625762, which contains 22 as substring.

8130391 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8130361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4065195 + 4065196.

It is an arithmetic number, because the mean of its divisors is an integer number (4065196).

Almost surely, 2^8130391 is an apocalyptic number.

8130391 is a deficient number, since it is larger than the sum of its proper divisors (1).

8130391 is an equidigital number, since it uses as much as digits as its factorization.

8130391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 8130391 is about 2851.3840498958. The cubic root of 8130391 is about 201.0807411404.

The spelling of 8130391 in words is "eight million, one hundred thirty thousand, three hundred ninety-one".