81346234 has 4 divisors (see below), whose sum is σ = 122019354. Its totient is φ = 40673116.

The previous prime is 81346159. The next prime is 81346249. The reversal of 81346234 is 43264318.

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

It can be written as a sum of positive squares in only one way, i.e., 70476025 + 10870209 = 8395^2 + 3297^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 81346196 and 81346205.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20336557 + ... + 20336560.

Almost surely, 2^81346234 is an apocalyptic number.

81346234 is a deficient number, since it is larger than the sum of its proper divisors (40673120).

81346234 is a wasteful number, since it uses less digits than its factorization.

81346234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40673119.

The product of its digits is 13824, while the sum is 31.

The square root of 81346234 is about 9019.2147108271. The cubic root of 81346234 is about 433.2904834684.

The spelling of 81346234 in words is "eighty-one million, three hundred forty-six thousand, two hundred thirty-four".