84797539 has 4 divisors (see below), whose sum is σ = 85366800. Its totient is φ = 84228280.

The previous prime is 84797533. The next prime is 84797569. The reversal of 84797539 is 93579748.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84797539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84797533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 284407 + ... + 284704.

It is an arithmetic number, because the mean of its divisors is an integer number (21341700).

Almost surely, 2^84797539 is an apocalyptic number.

84797539 is a deficient number, since it is larger than the sum of its proper divisors (569261).

84797539 is a wasteful number, since it uses less digits than its factorization.

84797539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569260.

The product of its digits is 1905120, while the sum is 52.

The square root of 84797539 is about 9208.5579218464. The cubic root of 84797539 is about 439.3335969234. Note that the first 3 decimals are identical.

The spelling of 84797539 in words is "eighty-four million, seven hundred ninety-seven thousand, five hundred thirty-nine".