84681311 has 16 divisors (see below), whose sum is σ = 99778560. Its totient is φ = 70852320.

The previous prime is 84681299. The next prime is 84681313. The reversal of 84681311 is 11318648.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-84681311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84681313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65570 + ... + 66848.

It is an arithmetic number, because the mean of its divisors is an integer number (6236160).

Almost surely, 2^84681311 is an apocalyptic number.

84681311 is a deficient number, since it is larger than the sum of its proper divisors (15097249).

84681311 is a wasteful number, since it uses less digits than its factorization.

84681311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1766.

The product of its digits is 4608, while the sum is 32.

The square root of 84681311 is about 9202.2448891561. The cubic root of 84681311 is about 439.1327805101.

Adding to 84681311 its reverse (11318648), we get a palindrome (95999959).

It can be divided in two parts, 8468 and 1311, that added together give a palindrome (9779).

The spelling of 84681311 in words is "eighty-four million, six hundred eighty-one thousand, three hundred eleven".