84538980829 has 2 divisors, whose sum is σ = 84538980830. Its totient is φ = 84538980828.

The previous prime is 84538980809. The next prime is 84538980871. The reversal of 84538980829 is 92808983548.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76824871929 + 7714108900 = 277173^2 + 87830^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84538980829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84538980809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42269490414 + 42269490415.

It is an arithmetic number, because the mean of its divisors is an integer number (42269490415).

Almost surely, 2^84538980829 is an apocalyptic number.

It is an amenable number.

84538980829 is a deficient number, since it is larger than the sum of its proper divisors (1).

84538980829 is an equidigital number, since it uses as much as digits as its factorization.

84538980829 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39813120, while the sum is 64.

The spelling of 84538980829 in words is "eighty-four billion, five hundred thirty-eight million, nine hundred eighty thousand, eight hundred twenty-nine".