81130926 has 16 divisors (see below), whose sum is σ = 162360144. Its totient is φ = 27027264.

The previous prime is 81130921. The next prime is 81130939. The reversal of 81130926 is 62903118.

It is a junction number, because it is equal to n+sod(n) for n = 81130893 and 81130902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81130921) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 10810 + ... + 16706.

It is an arithmetic number, because the mean of its divisors is an integer number (10147509).

Almost surely, 2^81130926 is an apocalyptic number.

81130926 is an abundant number, since it is smaller than the sum of its proper divisors (81229218).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81130926 is a wasteful number, since it uses less digits than its factorization.

81130926 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8195.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 81130926 is about 9007.2707298049. The cubic root of 81130926 is about 432.9078665488.

The spelling of 81130926 in words is "eighty-one million, one hundred thirty thousand, nine hundred twenty-six".