84213539 has 2 divisors, whose sum is σ = 84213540. Its totient is φ = 84213538.

The previous prime is 84213533. The next prime is 84213551. The reversal of 84213539 is 93531248.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84213539 - 2⁴ = 84213523 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 84213499 and 84213508.

It is not a weakly prime, because it can be changed into another prime (84213533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42106769 + 42106770.

It is an arithmetic number, because the mean of its divisors is an integer number (42106770).

Almost surely, 2^84213539 is an apocalyptic number.

84213539 is a deficient number, since it is larger than the sum of its proper divisors (1).

84213539 is an equidigital number, since it uses as much as digits as its factorization.

84213539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 35.

The square root of 84213539 is about 9176.7935031796. The cubic root of 84213539 is about 438.3227103338.

The spelling of 84213539 in words is "eighty-four million, two hundred thirteen thousand, five hundred thirty-nine".