81144083 has 2 divisors, whose sum is σ = 81144084. Its totient is φ = 81144082.

The previous prime is 81144061. The next prime is 81144097. The reversal of 81144083 is 38044118.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81144083 - 2²⁴ = 64366867 is a prime.

It is equal to p_4732445 and since 81144083 and 4732445 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (81144013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40572041 + 40572042.

It is an arithmetic number, because the mean of its divisors is an integer number (40572042).

Almost surely, 2^81144083 is an apocalyptic number.

81144083 is a deficient number, since it is larger than the sum of its proper divisors (1).

81144083 is an equidigital number, since it uses as much as digits as its factorization.

81144083 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 81144083 is about 9008.0010546181. The cubic root of 81144083 is about 432.9312668361.

The spelling of 81144083 in words is "eighty-one million, one hundred forty-four thousand, eighty-three".