130391 has 4 divisors (see below), whose sum is σ = 131784. Its totient is φ = 129000.

The previous prime is 130379. The next prime is 130399. The reversal of 130391 is 193031.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-130391 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 545 + ... + 746.

It is an arithmetic number, because the mean of its divisors is an integer number (32946).

2¹³⁰³⁹¹ is an apocalyptic number.

130391 is a deficient number, since it is larger than the sum of its proper divisors (1393).

130391 is a wasteful number, since it uses less digits than its factorization.

130391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1392.

The product of its (nonzero) digits is 81, while the sum is 17.

The square root of 130391 is about 361.0969398929. The cubic root of 130391 is about 50.7087072203.

The spelling of 130391 in words is "one hundred thirty thousand, three hundred ninety-one".