81724483 has 2 divisors, whose sum is σ = 81724484. Its totient is φ = 81724482.

The previous prime is 81724477. The next prime is 81724519. The reversal of 81724483 is 38442718.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81724483 - 2¹⁷ = 81593411 is a prime.

It is a super-2 number, since 2×81724483² = 13357782243234578, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (81724183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40862241 + 40862242.

It is an arithmetic number, because the mean of its divisors is an integer number (40862242).

Almost surely, 2^81724483 is an apocalyptic number.

81724483 is a deficient number, since it is larger than the sum of its proper divisors (1).

81724483 is an equidigital number, since it uses as much as digits as its factorization.

81724483 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43008, while the sum is 37.

The square root of 81724483 is about 9040.1594565583. The cubic root of 81724483 is about 433.9610259692.

The spelling of 81724483 in words is "eighty-one million, seven hundred twenty-four thousand, four hundred eighty-three".