81130363 has 2 divisors, whose sum is σ = 81130364. Its totient is φ = 81130362.

The previous prime is 81130339. The next prime is 81130373. The reversal of 81130363 is 36303118.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81130363 - 2⁵ = 81130331 is a prime.

It is not a weakly prime, because it can be changed into another prime (81130303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40565181 + 40565182.

It is an arithmetic number, because the mean of its divisors is an integer number (40565182).

Almost surely, 2^81130363 is an apocalyptic number.

81130363 is a deficient number, since it is larger than the sum of its proper divisors (1).

81130363 is an equidigital number, since it uses as much as digits as its factorization.

81130363 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 81130363 is about 9007.2394772205. The cubic root of 81130363 is about 432.9068651728.

The spelling of 81130363 in words is "eighty-one million, one hundred thirty thousand, three hundred sixty-three".