84631311 has 24 divisors (see below), whose sum is σ = 128943360. Its totient is φ = 55455192.

The previous prime is 84631297. The next prime is 84631319. The reversal of 84631311 is 11313648.

It is not a de Polignac number, because 84631311 - 2⁵ = 84631279 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84631319) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11386 + ... + 17288.

It is an arithmetic number, because the mean of its divisors is an integer number (5372640).

Almost surely, 2^84631311 is an apocalyptic number.

84631311 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

84631311 is a deficient number, since it is larger than the sum of its proper divisors (44312049).

84631311 is an equidigital number, since it uses as much as digits as its factorization.

84631311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5977 (or 5965 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 84631311 is about 9199.5277596190. The cubic root of 84631311 is about 439.0463349823.

Adding to 84631311 its reverse (11313648), we get a palindrome (95944959).

The spelling of 84631311 in words is "eighty-four million, six hundred thirty-one thousand, three hundred eleven".