81574343 has 2 divisors, whose sum is σ = 81574344. Its totient is φ = 81574342.

The previous prime is 81574327. The next prime is 81574393. The reversal of 81574343 is 34347518.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81574343 - 2⁴ = 81574327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81574393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40787171 + 40787172.

It is an arithmetic number, because the mean of its divisors is an integer number (40787172).

Almost surely, 2^81574343 is an apocalyptic number.

81574343 is a deficient number, since it is larger than the sum of its proper divisors (1).

81574343 is an equidigital number, since it uses as much as digits as its factorization.

81574343 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 35.

The square root of 81574343 is about 9031.8515820401. The cubic root of 81574343 is about 433.6951127995.

The spelling of 81574343 in words is "eighty-one million, five hundred seventy-four thousand, three hundred forty-three".