84738539 has 2 divisors, whose sum is σ = 84738540. Its totient is φ = 84738538.

The previous prime is 84738527. The next prime is 84738541. The reversal of 84738539 is 93583748.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84738539 is a prime.

Together with 84738541, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 84738493 and 84738502.

It is not a weakly prime, because it can be changed into another prime (84738569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42369269 + 42369270.

It is an arithmetic number, because the mean of its divisors is an integer number (42369270).

Almost surely, 2^84738539 is an apocalyptic number.

84738539 is a deficient number, since it is larger than the sum of its proper divisors (1).

84738539 is an equidigital number, since it uses as much as digits as its factorization.

84738539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 47.

The square root of 84738539 is about 9205.3538226404. The cubic root of 84738539 is about 439.2316808517.

The spelling of 84738539 in words is "eighty-four million, seven hundred thirty-eight thousand, five hundred thirty-nine".