81713063 has 2 divisors, whose sum is σ = 81713064. Its totient is φ = 81713062.

The previous prime is 81712991. The next prime is 81713069. The reversal of 81713063 is 36031718.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81713063 - 2¹² = 81708967 is a prime.

It is a Sophie Germain prime.

It is a plaindrome in base 12.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81713069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40856531 + 40856532.

It is an arithmetic number, because the mean of its divisors is an integer number (40856532).

Almost surely, 2^81713063 is an apocalyptic number.

81713063 is a deficient number, since it is larger than the sum of its proper divisors (1).

81713063 is an equidigital number, since it uses as much as digits as its factorization.

81713063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 81713063 is about 9039.5278084643. The cubic root of 81713063 is about 433.9408114403.

The spelling of 81713063 in words is "eighty-one million, seven hundred thirteen thousand, sixty-three".