8240431 has 2 divisors, whose sum is σ = 8240432. Its totient is φ = 8240430.

The previous prime is 8240399. The next prime is 8240447. The reversal of 8240431 is 1340428.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8240431 - 2⁵ = 8240399 is a prime.

It is a super-2 number, since 2×8240431² = 135809406131522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8240131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4120215 + 4120216.

It is an arithmetic number, because the mean of its divisors is an integer number (4120216).

Almost surely, 2^8240431 is an apocalyptic number.

8240431 is a deficient number, since it is larger than the sum of its proper divisors (1).

8240431 is an equidigital number, since it uses as much as digits as its factorization.

8240431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 8240431 is about 2870.6150908821. The cubic root of 8240431 is about 201.9838483312.

Adding to 8240431 its reverse (1340428), we get a palindrome (9580859).

The spelling of 8240431 in words is "eight million, two hundred forty thousand, four hundred thirty-one".