84336431 has 4 divisors (see below), whose sum is σ = 86615832. Its totient is φ = 82057032.

The previous prime is 84336403. The next prime is 84336433. The reversal of 84336431 is 13463348.

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-84336431 is a prime.

It is a super-2 number, since 2×84336431² = 14225267187635522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84336433) 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, 1139645 + ... + 1139718.

It is an arithmetic number, because the mean of its divisors is an integer number (21653958).

Almost surely, 2^84336431 is an apocalyptic number.

84336431 is a deficient number, since it is larger than the sum of its proper divisors (2279401).

84336431 is a wasteful number, since it uses less digits than its factorization.

84336431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2279400.

The product of its digits is 20736, while the sum is 32.

The square root of 84336431 is about 9183.4868650203. The cubic root of 84336431 is about 438.5358200632.

Adding to 84336431 its reverse (13463348), we get a palindrome (97799779).

The spelling of 84336431 in words is "eighty-four million, three hundred thirty-six thousand, four hundred thirty-one".