84457475129 has 2 divisors, whose sum is σ = 84457475130. Its totient is φ = 84457475128.

The previous prime is 84457475099. The next prime is 84457475171. The reversal of 84457475129 is 92157475448.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48347214400 + 36110260729 = 219880^2 + 190027^2 .

It is a cyclic number.

It is not a de Polignac number, because 84457475129 - 2⁸ = 84457474873 is a prime.

It is not a weakly prime, because it can be changed into another prime (84457475029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42228737564 + 42228737565.

It is an arithmetic number, because the mean of its divisors is an integer number (42228737565).

Almost surely, 2^84457475129 is an apocalyptic number.

It is an amenable number.

84457475129 is a deficient number, since it is larger than the sum of its proper divisors (1).

84457475129 is an equidigital number, since it uses as much as digits as its factorization.

84457475129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11289600, while the sum is 56.

The spelling of 84457475129 in words is "eighty-four billion, four hundred fifty-seven million, four hundred seventy-five thousand, one hundred twenty-nine".