84263139 has 8 divisors (see below), whose sum is σ = 124834320. Its totient is φ = 56175408.

The previous prime is 84263131. The next prime is 84263141. The reversal of 84263139 is 93136248.

It is not a de Polignac number, because 84263139 - 2³ = 84263131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84263131) 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, 1560402 + ... + 1560455.

It is an arithmetic number, because the mean of its divisors is an integer number (15604290).

Almost surely, 2^84263139 is an apocalyptic number.

84263139 is a deficient number, since it is larger than the sum of its proper divisors (40571181).

84263139 is a wasteful number, since it uses less digits than its factorization.

84263139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3120866 (or 3120860 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 84263139 is about 9179.4955743766. The cubic root of 84263139 is about 438.4087477248.

The spelling of 84263139 in words is "eighty-four million, two hundred sixty-three thousand, one hundred thirty-nine".