81414434 has 16 divisors (see below), whose sum is σ = 130146048. Its totient is φ = 38107872.

The previous prime is 81414433. The next prime is 81414461. The reversal of 81414434 is 43441418.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 81414397 and 81414406.

It is not an unprimeable number, because it can be changed into a prime (81414433) by changing a digit.

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, 16667 + ... + 20990.

It is an arithmetic number, because the mean of its divisors is an integer number (8134128).

Almost surely, 2^81414434 is an apocalyptic number.

81414434 is a deficient number, since it is larger than the sum of its proper divisors (48731614).

81414434 is a wasteful number, since it uses less digits than its factorization.

81414434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37729.

The product of its digits is 6144, while the sum is 29.

The square root of 81414434 is about 9022.9947356740. The cubic root of 81414434 is about 433.4115386793.

The spelling of 81414434 in words is "eighty-one million, four hundred fourteen thousand, four hundred thirty-four".