84280631 has 2 divisors, whose sum is σ = 84280632. Its totient is φ = 84280630.

The previous prime is 84280613. The next prime is 84280643. The reversal of 84280631 is 13608248.

Together with previous prime (84280613) 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 a de Polignac number, because none of the positive numbers 2^k-84280631 is a prime.

It is a super-2 number, since 2×84280631² = 14206449523516322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84280331) 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, 42140315 + 42140316.

It is an arithmetic number, because the mean of its divisors is an integer number (42140316).

Almost surely, 2^84280631 is an apocalyptic number.

84280631 is a deficient number, since it is larger than the sum of its proper divisors (1).

84280631 is an equidigital number, since it uses as much as digits as its factorization.

84280631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 84280631 is about 9180.4483006006. The cubic root of 84280631 is about 438.4390817290.

Adding to 84280631 its reverse (13608248), we get a palindrome (97888879).

The spelling of 84280631 in words is "eighty-four million, two hundred eighty thousand, six hundred thirty-one".