81029763 has 12 divisors (see below), whose sum is σ = 117172120. Its totient is φ = 53960256.

The previous prime is 81029749. The next prime is 81029807. The reversal of 81029763 is 36792018.

It is not a de Polignac number, because 81029763 - 2⁹ = 81029251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81029723) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4620 + ... + 13542.

Almost surely, 2^81029763 is an apocalyptic number.

81029763 is a deficient number, since it is larger than the sum of its proper divisors (36142357).

81029763 is a wasteful number, since it uses less digits than its factorization.

81029763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9938 (or 9935 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 81029763 is about 9001.6533481356. The cubic root of 81029763 is about 432.7278592619.

The spelling of 81029763 in words is "eighty-one million, twenty-nine thousand, seven hundred sixty-three".