84345431 has 2 divisors, whose sum is σ = 84345432. Its totient is φ = 84345430.

The previous prime is 84345413. The next prime is 84345433. The reversal of 84345431 is 13454348.

Together with previous prime (84345413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84345431 - 2⁶ = 84345367 is a prime.

It is a super-2 number, since 2×84345431² = 14228303461151522, which contains 22 as substring.

Together with 84345433, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84345433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42172715 + 42172716.

It is an arithmetic number, because the mean of its divisors is an integer number (42172716).

Almost surely, 2^84345431 is an apocalyptic number.

84345431 is a deficient number, since it is larger than the sum of its proper divisors (1).

84345431 is an equidigital number, since it uses as much as digits as its factorization.

84345431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23040, while the sum is 32.

The square root of 84345431 is about 9183.9768619047. The cubic root of 84345431 is about 438.5514190238.

Adding to 84345431 its reverse (13454348), we get a palindrome (97799779).

The spelling of 84345431 in words is "eighty-four million, three hundred forty-five thousand, four hundred thirty-one".