130681993 has 16 divisors (see below), whose sum is σ = 143337600. Its totient is φ = 118419840.

The previous prime is 130681979. The next prime is 130682017. The reversal of 130681993 is 399186031.

It is not a de Polignac number, because 130681993 - 2¹³ = 130673801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (130681913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 206788 + ... + 207418.

It is an arithmetic number, because the mean of its divisors is an integer number (8958600).

Almost surely, 2^130681993 is an apocalyptic number.

130681993 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

130681993 is a deficient number, since it is larger than the sum of its proper divisors (12655607).

130681993 is a wasteful number, since it uses less digits than its factorization.

130681993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 912.

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 130681993 is about 11431.6225007651. The cubic root of 130681993 is about 507.4640132377.

The spelling of 130681993 in words is "one hundred thirty million, six hundred eighty-one thousand, nine hundred ninety-three".