84081013 has 2 divisors, whose sum is σ = 84081014. Its totient is φ = 84081012.

The previous prime is 84081007. The next prime is 84081071. The reversal of 84081013 is 31018048.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63632529 + 20448484 = 7977^2 + 4522^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84081013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84081713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42040506 + 42040507.

It is an arithmetic number, because the mean of its divisors is an integer number (42040507).

Almost surely, 2^84081013 is an apocalyptic number.

It is an amenable number.

84081013 is a deficient number, since it is larger than the sum of its proper divisors (1).

84081013 is an equidigital number, since it uses as much as digits as its factorization.

84081013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 84081013 is about 9169.5699462952. The cubic root of 84081013 is about 438.0926616017.

The spelling of 84081013 in words is "eighty-four million, eighty-one thousand, thirteen".