81434203 has 2 divisors, whose sum is σ = 81434204. Its totient is φ = 81434202.

The previous prime is 81434167. The next prime is 81434239. The reversal of 81434203 is 30243418.

It is a balanced prime because it is at equal distance from previous prime (81434167) and next prime (81434239).

It is a cyclic number.

It is not a de Polignac number, because 81434203 - 2²⁵ = 47879771 is a prime.

It is not a weakly prime, because it can be changed into another prime (81434263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40717101 + 40717102.

It is an arithmetic number, because the mean of its divisors is an integer number (40717102).

Almost surely, 2^81434203 is an apocalyptic number.

81434203 is a deficient number, since it is larger than the sum of its proper divisors (1).

81434203 is an equidigital number, since it uses as much as digits as its factorization.

81434203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 81434203 is about 9024.0901480426. The cubic root of 81434203 is about 433.4466160765.

The spelling of 81434203 in words is "eighty-one million, four hundred thirty-four thousand, two hundred three".