81234098 has 16 divisors (see below), whose sum is σ = 134248320. Its totient is φ = 36558000.

The previous prime is 81234073. The next prime is 81234113. The reversal of 81234098 is 89043218.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16058 + ... + 20501.

It is an arithmetic number, because the mean of its divisors is an integer number (8390520).

Almost surely, 2^81234098 is an apocalyptic number.

81234098 is a deficient number, since it is larger than the sum of its proper divisors (53014222).

81234098 is a wasteful number, since it uses less digits than its factorization.

81234098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36673.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 81234098 is about 9012.9960612440. The cubic root of 81234098 is about 433.0912945514.

It can be divided in two parts, 8123 and 4098, that added together give a palindrome (12221).

The spelling of 81234098 in words is "eighty-one million, two hundred thirty-four thousand, ninety-eight".