8091431 has 2 divisors, whose sum is σ = 8091432. Its totient is φ = 8091430.

The previous prime is 8091427. The next prime is 8091443. The reversal of 8091431 is 1341908.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8091431 - 2² = 8091427 is a prime.

It is a super-2 number, since 2×8091431² = 130942511255522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8091431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8091451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4045715 + 4045716.

It is an arithmetic number, because the mean of its divisors is an integer number (4045716).

Almost surely, 2^8091431 is an apocalyptic number.

8091431 is a deficient number, since it is larger than the sum of its proper divisors (1).

8091431 is an equidigital number, since it uses as much as digits as its factorization.

8091431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 8091431 is about 2844.5440759461. The cubic root of 8091431 is about 200.7590406422.

The spelling of 8091431 in words is "eight million, ninety-one thousand, four hundred thirty-one".