81914846 has 8 divisors (see below), whose sum is σ = 132324024. Its totient is φ = 37806840.

The previous prime is 81914831. The next prime is 81914849. The reversal of 81914846 is 64841918.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81914849) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1575260 + ... + 1575311.

It is an arithmetic number, because the mean of its divisors is an integer number (16540503).

Almost surely, 2^81914846 is an apocalyptic number.

81914846 is a deficient number, since it is larger than the sum of its proper divisors (50409178).

81914846 is a wasteful number, since it uses less digits than its factorization.

81914846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3150586.

The product of its digits is 55296, while the sum is 41.

The square root of 81914846 is about 9050.6820737445. The cubic root of 81914846 is about 434.2977103207.

The spelling of 81914846 in words is "eighty-one million, nine hundred fourteen thousand, eight hundred forty-six".