84204013 has 2 divisors, whose sum is σ = 84204014. Its totient is φ = 84204012.

The previous prime is 84204011. The next prime is 84204031. The reversal of 84204013 is 31040248.

Together with next prime (84204031) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81685444 + 2518569 = 9038^2 + 1587^2 .

It is a cyclic number.

It is not a de Polignac number, because 84204013 - 2¹ = 84204011 is a prime.

Together with 84204011, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84204011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42102006 + 42102007.

It is an arithmetic number, because the mean of its divisors is an integer number (42102007).

Almost surely, 2^84204013 is an apocalyptic number.

It is an amenable number.

84204013 is a deficient number, since it is larger than the sum of its proper divisors (1).

84204013 is an equidigital number, since it uses as much as digits as its factorization.

84204013 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 22.

The square root of 84204013 is about 9176.2744618936. The cubic root of 84204013 is about 438.3061824309.

The spelling of 84204013 in words is "eighty-four million, two hundred four thousand, thirteen".