84523139 has 8 divisors (see below), whose sum is σ = 88289760. Its totient is φ = 80813376.

The previous prime is 84523111. The next prime is 84523141. The reversal of 84523139 is 93132548.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 84523139 - 2⁸ = 84522883 is a prime.

It is a super-2 number, since 2×84523139² = 14288322052826642, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 84523099 and 84523108.

It is not an unprimeable number, because it can be changed into a prime (84523169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11162 + ... + 17135.

It is an arithmetic number, because the mean of its divisors is an integer number (11036220).

Almost surely, 2^84523139 is an apocalyptic number.

84523139 is a deficient number, since it is larger than the sum of its proper divisors (3766621).

84523139 is a wasteful number, since it uses less digits than its factorization.

84523139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28429.

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

The square root of 84523139 is about 9193.6466649529. The cubic root of 84523139 is about 438.8591986918.

The spelling of 84523139 in words is "eighty-four million, five hundred twenty-three thousand, one hundred thirty-nine".