81535763 has 2 divisors, whose sum is σ = 81535764. Its totient is φ = 81535762.

The previous prime is 81535693. The next prime is 81535771. The reversal of 81535763 is 36753518.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81535763 - 2¹⁴ = 81519379 is a prime.

It is not a weakly prime, because it can be changed into another prime (81535063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40767881 + 40767882.

It is an arithmetic number, because the mean of its divisors is an integer number (40767882).

Almost surely, 2^81535763 is an apocalyptic number.

81535763 is a deficient number, since it is larger than the sum of its proper divisors (1).

81535763 is an equidigital number, since it uses as much as digits as its factorization.

81535763 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75600, while the sum is 38.

The square root of 81535763 is about 9029.7155547669. The cubic root of 81535763 is about 433.6267310212.

The spelling of 81535763 in words is "eighty-one million, five hundred thirty-five thousand, seven hundred sixty-three".