81752863 has 2 divisors, whose sum is σ = 81752864. Its totient is φ = 81752862.

The previous prime is 81752849. The next prime is 81752887. The reversal of 81752863 is 36825718.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81752863 - 2⁵ = 81752831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81752063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40876431 + 40876432.

It is an arithmetic number, because the mean of its divisors is an integer number (40876432).

Almost surely, 2^81752863 is an apocalyptic number.

81752863 is a deficient number, since it is larger than the sum of its proper divisors (1).

81752863 is an equidigital number, since it uses as much as digits as its factorization.

81752863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 40.

The square root of 81752863 is about 9041.7289828882. The cubic root of 81752863 is about 434.0112532211.

The spelling of 81752863 in words is "eighty-one million, seven hundred fifty-two thousand, eight hundred sixty-three".