81142883 has 2 divisors, whose sum is σ = 81142884. Its totient is φ = 81142882.

The previous prime is 81142861. The next prime is 81142891. The reversal of 81142883 is 38824118.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81142883 - 2²⁶ = 14034019 is a prime.

It is not a weakly prime, because it can be changed into another prime (81142823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40571441 + 40571442.

It is an arithmetic number, because the mean of its divisors is an integer number (40571442).

Almost surely, 2^81142883 is an apocalyptic number.

81142883 is a deficient number, since it is larger than the sum of its proper divisors (1).

81142883 is an equidigital number, since it uses as much as digits as its factorization.

81142883 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12288, while the sum is 35.

The square root of 81142883 is about 9007.9344469196. The cubic root of 81142883 is about 432.9291326897.

The spelling of 81142883 in words is "eighty-one million, one hundred forty-two thousand, eight hundred eighty-three".