84557513 has 4 divisors (see below), whose sum is σ = 85333380. Its totient is φ = 83781648.

The previous prime is 84557497. The next prime is 84557527. The reversal of 84557513 is 31575548.

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

It can be written as a sum of positive squares in 2 ways, for example, as 70778569 + 13778944 = 8413^2 + 3712^2 .

It is a cyclic number.

It is not a de Polignac number, because 84557513 - 2⁴ = 84557497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84557113) 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, 387770 + ... + 387987.

It is an arithmetic number, because the mean of its divisors is an integer number (21333345).

Almost surely, 2^84557513 is an apocalyptic number.

It is an amenable number.

84557513 is a deficient number, since it is larger than the sum of its proper divisors (775867).

84557513 is a wasteful number, since it uses less digits than its factorization.

84557513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775866.

The product of its digits is 84000, while the sum is 38.

The square root of 84557513 is about 9195.5159180983. The cubic root of 84557513 is about 438.9186826066.

The spelling of 84557513 in words is "eighty-four million, five hundred fifty-seven thousand, five hundred thirteen".