71812834 has 4 divisors (see below), whose sum is σ = 107719254. Its totient is φ = 35906416.

The previous prime is 71812823. The next prime is 71812841. The reversal of 71812834 is 43821817.

It is a happy number.

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., 68939809 + 2873025 = 8303^2 + 1695^2 .

It is a super-2 number, since 2×71812834² = 10314166254223112, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 71812834.

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 as a sum of consecutive naturals, namely, 17953207 + ... + 17953210.

Almost surely, 2^71812834 is an apocalyptic number.

71812834 is a deficient number, since it is larger than the sum of its proper divisors (35906420).

71812834 is a wasteful number, since it uses less digits than its factorization.

71812834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35906419.

The product of its digits is 10752, while the sum is 34.

The square root of 71812834 is about 8474.2453351316. The cubic root of 71812834 is about 415.6559694186.

The spelling of 71812834 in words is "seventy-one million, eight hundred twelve thousand, eight hundred thirty-four".