84824131 has 4 divisors (see below), whose sum is σ = 96941872. Its totient is φ = 72706392.

The previous prime is 84824111. The next prime is 84824137. The reversal of 84824131 is 13142848.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 84824131 - 2²³ = 76435523 is a prime.

It is a super-3 number, since 3×84824131³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 84824093 and 84824102.

It is not an unprimeable number, because it can be changed into a prime (84824137) 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, 6058860 + ... + 6058873.

It is an arithmetic number, because the mean of its divisors is an integer number (24235468).

Almost surely, 2^84824131 is an apocalyptic number.

84824131 is a deficient number, since it is larger than the sum of its proper divisors (12117741).

84824131 is a wasteful number, since it uses less digits than its factorization.

84824131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12117740.

The product of its digits is 6144, while the sum is 31.

The square root of 84824131 is about 9210.0016829532. The cubic root of 84824131 is about 439.3795162513.

Subtracting from 84824131 its sum of digits (31), we obtain a square (84824100 = 9210²).

Adding to 84824131 its reverse (13142848), we get a palindrome (97966979).

The spelling of 84824131 in words is "eighty-four million, eight hundred twenty-four thousand, one hundred thirty-one".