84317431 has 8 divisors (see below), whose sum is σ = 93542400. Its totient is φ = 75352440.

The previous prime is 84317419. The next prime is 84317437. The reversal of 84317431 is 13471348.

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

It is a de Polignac number, because none of the positive numbers 2^k-84317431 is a prime.

It is a super-2 number, since 2×84317431² = 14218858340879522, 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 = 84317393 and 84317402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84317437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64311 + ... + 65608.

It is an arithmetic number, because the mean of its divisors is an integer number (11692800).

Almost surely, 2^84317431 is an apocalyptic number.

84317431 is a deficient number, since it is larger than the sum of its proper divisors (9224969).

84317431 is a wasteful number, since it uses less digits than its factorization.

84317431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129989.

The product of its digits is 8064, while the sum is 31.

The square root of 84317431 is about 9182.4523412866. The cubic root of 84317431 is about 438.5028852794.

Adding to 84317431 its reverse (13471348), we get a palindrome (97788779).

It can be divided in two parts, 84317 and 431, that added together give a palindrome (84748).

The spelling of 84317431 in words is "eighty-four million, three hundred seventeen thousand, four hundred thirty-one".