130505643 has 12 divisors (see below), whose sum is σ = 190452808. Its totient is φ = 86106240.

The previous prime is 130505633. The next prime is 130505647. The reversal of 130505643 is 346505031.

130505643 is a `hidden beast` number, since 13 + 0 + 5 + 0 + 5 + 643 = 666.

It is not a de Polignac number, because 130505643 - 2⁹ = 130505131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (130505647) 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, 73873 + ... + 75618.

Almost surely, 2^130505643 is an apocalyptic number.

130505643 is a deficient number, since it is larger than the sum of its proper divisors (59947165).

130505643 is a wasteful number, since it uses less digits than its factorization.

130505643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149594 (or 149591 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 130505643 is about 11423.9066435261. The cubic root of 130505643 is about 507.2356431773.

The spelling of 130505643 in words is "one hundred thirty million, five hundred five thousand, six hundred forty-three".