84131830 has 16 divisors (see below), whose sum is σ = 156322944. Its totient is φ = 32567040.

The previous prime is 84131809. The next prime is 84131851. The reversal of 84131830 is 3813148.

It is an interprime number because it is at equal distance from previous prime (84131809) and next prime (84131851).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135387 + ... + 136006.

It is an arithmetic number, because the mean of its divisors is an integer number (9770184).

Almost surely, 2^84131830 is an apocalyptic number.

84131830 is a deficient number, since it is larger than the sum of its proper divisors (72191114).

84131830 is a wasteful number, since it uses less digits than its factorization.

84131830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271431.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 84131830 is about 9172.3404864844. The cubic root of 84131830 is about 438.1809021786.

Adding to 84131830 its reverse (3813148), we get a palindrome (87944978).

The spelling of 84131830 in words is "eighty-four million, one hundred thirty-one thousand, eight hundred thirty".