81883547 has 2 divisors, whose sum is σ = 81883548. Its totient is φ = 81883546.

The previous prime is 81883537. The next prime is 81883561. The reversal of 81883547 is 74538818.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81883547 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 81883498 and 81883507.

It is not a weakly prime, because it can be changed into another prime (81883517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40941773 + 40941774.

It is an arithmetic number, because the mean of its divisors is an integer number (40941774).

Almost surely, 2^81883547 is an apocalyptic number.

81883547 is a deficient number, since it is larger than the sum of its proper divisors (1).

81883547 is an equidigital number, since it uses as much as digits as its factorization.

81883547 is an evil number, because the sum of its binary digits is even.

The product of its digits is 215040, while the sum is 44.

The square root of 81883547 is about 9048.9528123424. The cubic root of 81883547 is about 434.2423893936.

The spelling of 81883547 in words is "eighty-one million, eight hundred eighty-three thousand, five hundred forty-seven".