81437714 has 16 divisors (see below), whose sum is σ = 123819840. Its totient is φ = 40167600.

The previous prime is 81437693. The next prime is 81437729. The reversal of 81437714 is 41773418.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71957 + ... + 73079.

It is an arithmetic number, because the mean of its divisors is an integer number (7738740).

Almost surely, 2^81437714 is an apocalyptic number.

81437714 is a deficient number, since it is larger than the sum of its proper divisors (42382126).

81437714 is a wasteful number, since it uses less digits than its factorization.

81437714 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1585.

The product of its digits is 18816, while the sum is 35.

The square root of 81437714 is about 9024.2846807933. The cubic root of 81437714 is about 433.4528452740.

The spelling of 81437714 in words is "eighty-one million, four hundred thirty-seven thousand, seven hundred fourteen".