81414811 has 2 divisors, whose sum is σ = 81414812. Its totient is φ = 81414810.

The previous prime is 81414761. The next prime is 81414833. The reversal of 81414811 is 11841418.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81414811 is a prime.

It is a Chen prime.

It is equal to p_4747303 and since 81414811 and 4747303 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 81414811.

It is not a weakly prime, because it can be changed into another prime (81414881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40707405 + 40707406.

It is an arithmetic number, because the mean of its divisors is an integer number (40707406).

Almost surely, 2^81414811 is an apocalyptic number.

81414811 is a deficient number, since it is larger than the sum of its proper divisors (1).

81414811 is an equidigital number, since it uses as much as digits as its factorization.

81414811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1024, while the sum is 28.

The square root of 81414811 is about 9023.0156267182. The cubic root of 81414811 is about 433.4122076676.

It can be divided in two parts, 814 and 14811, that added together give a 6-th power (15625 = 5⁶).

The spelling of 81414811 in words is "eighty-one million, four hundred fourteen thousand, eight hundred eleven".