84259134761 has 2 divisors, whose sum is σ = 84259134762. Its totient is φ = 84259134760.

The previous prime is 84259134749. The next prime is 84259134763. The reversal of 84259134761 is 16743195248.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82389091225 + 1870043536 = 287035^2 + 43244^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84259134761 is a prime.

Together with 84259134763, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (84259134763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42129567380 + 42129567381.

It is an arithmetic number, because the mean of its divisors is an integer number (42129567381).

Almost surely, 2^84259134761 is an apocalyptic number.

It is an amenable number.

84259134761 is a deficient number, since it is larger than the sum of its proper divisors (1).

84259134761 is an equidigital number, since it uses as much as digits as its factorization.

84259134761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1451520, while the sum is 50.

The spelling of 84259134761 in words is "eighty-four billion, two hundred fifty-nine million, one hundred thirty-four thousand, seven hundred sixty-one".