81763298 has 24 divisors (see below), whose sum is σ = 129567900. Its totient is φ = 38690784.

The previous prime is 81763271. The next prime is 81763313. The reversal of 81763298 is 89236718.

It can be written as a sum of positive squares in 2 ways, for example, as 80874049 + 889249 = 8993^2 + 943^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 114968 + ... + 115676.

Almost surely, 2^81763298 is an apocalyptic number.

81763298 is a deficient number, since it is larger than the sum of its proper divisors (47804602).

81763298 is a wasteful number, since it uses less digits than its factorization.

81763298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 866 (or 843 counting only the distinct ones).

The product of its digits is 145152, while the sum is 44.

The square root of 81763298 is about 9042.3060111898. The cubic root of 81763298 is about 434.0297182818.

The spelling of 81763298 in words is "eighty-one million, seven hundred sixty-three thousand, two hundred ninety-eight".