84431513 has 4 divisors (see below), whose sum is σ = 84559908. Its totient is φ = 84303120.

The previous prime is 84431483. The next prime is 84431531. The reversal of 84431513 is 31513448.

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 26245129 + 58186384 = 5123^2 + 7628^2 .

It is a cyclic number.

It is not a de Polignac number, because 84431513 - 2¹⁶ = 84365977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84431533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63206 + ... + 64527.

It is an arithmetic number, because the mean of its divisors is an integer number (21139977).

Almost surely, 2^84431513 is an apocalyptic number.

It is an amenable number.

84431513 is a deficient number, since it is larger than the sum of its proper divisors (128395).

84431513 is a wasteful number, since it uses less digits than its factorization.

84431513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128394.

The product of its digits is 5760, while the sum is 29.

The square root of 84431513 is about 9188.6621986011. The cubic root of 84431513 is about 438.7005618492.

The spelling of 84431513 in words is "eighty-four million, four hundred thirty-one thousand, five hundred thirteen".