81434814 has 8 divisors (see below), whose sum is σ = 162869640. Its totient is φ = 27144936.

The previous prime is 81434807. The next prime is 81434831. The reversal of 81434814 is 41843418.

It is a sphenic number, since it is the product of 3 distinct primes.

81434814 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6786229 + ... + 6786240.

It is an arithmetic number, because the mean of its divisors is an integer number (20358705).

Almost surely, 2^81434814 is an apocalyptic number.

81434814 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81434814 is a wasteful number, since it uses less digits than its factorization.

81434814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13572474.

The product of its digits is 12288, while the sum is 33.

The square root of 81434814 is about 9024.1240018076. The cubic root of 81434814 is about 433.4477001223.

The spelling of 81434814 in words is "eighty-one million, four hundred thirty-four thousand, eight hundred fourteen".