130394781 has 12 divisors (see below), whose sum is σ = 205470720. Its totient is φ = 79027080.

The previous prime is 130394749. The next prime is 130394783. The reversal of 130394781 is 187493031.

It is a happy number.

It is not a de Polignac number, because 130394781 - 2⁵ = 130394749 is a prime.

It is a super-2 number, since 2×130394781² = 34005597824075922, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130394783) 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, 658461 + ... + 658658.

It is an arithmetic number, because the mean of its divisors is an integer number (17122560).

Almost surely, 2^130394781 is an apocalyptic number.

130394781 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

130394781 is a deficient number, since it is larger than the sum of its proper divisors (75075939).

130394781 is a wasteful number, since it uses less digits than its factorization.

130394781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1317136 (or 1317133 counting only the distinct ones).

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

The square root of 130394781 is about 11419.0534196141. The cubic root of 130394781 is about 507.0919735574.

The spelling of 130394781 in words is "one hundred thirty million, three hundred ninety-four thousand, seven hundred eighty-one".