84427107431 has 2 divisors, whose sum is σ = 84427107432. Its totient is φ = 84427107430.

The previous prime is 84427107421. The next prime is 84427107473. The reversal of 84427107431 is 13470172448.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84427107431 is a prime.

It is a super-2 number, since 2×84427107431² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84427107421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42213553715 + 42213553716.

It is an arithmetic number, because the mean of its divisors is an integer number (42213553716).

Almost surely, 2^84427107431 is an apocalyptic number.

84427107431 is a deficient number, since it is larger than the sum of its proper divisors (1).

84427107431 is an equidigital number, since it uses as much as digits as its factorization.

84427107431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 150528, while the sum is 41.

Adding to 84427107431 its reverse (13470172448), we get a palindrome (97897279879).

The spelling of 84427107431 in words is "eighty-four billion, four hundred twenty-seven million, one hundred seven thousand, four hundred thirty-one".