84108431 has 6 divisors (see below), whose sum is σ = 92449896. Its totient is φ = 76462100.

The previous prime is 84108407. The next prime is 84108443. The reversal of 84108431 is 13480148.

It is not a de Polignac number, because 84108431 - 2¹⁰ = 84107407 is a prime.

It is a super-2 number, since 2×84108431² = 14148456330563522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 84108394 and 84108403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84108481) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 347435 + ... + 347676.

It is an arithmetic number, because the mean of its divisors is an integer number (15408316).

Almost surely, 2^84108431 is an apocalyptic number.

84108431 is a deficient number, since it is larger than the sum of its proper divisors (8341465).

84108431 is a wasteful number, since it uses less digits than its factorization.

84108431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695133 (or 695122 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 84108431 is about 9171.0648781916. The cubic root of 84108431 is about 438.1402756777.

Adding to 84108431 its reverse (13480148), we get a palindrome (97588579).

The spelling of 84108431 in words is "eighty-four million, one hundred eight thousand, four hundred thirty-one".