130605691 has 4 divisors (see below), whose sum is σ = 130672152. Its totient is φ = 130539232.

The previous prime is 130605637. The next prime is 130605719. The reversal of 130605691 is 196506031.

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

It is a cyclic number.

It is not a de Polignac number, because 130605691 - 2¹³ = 130597499 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (130605191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30190 + ... + 34243.

It is an arithmetic number, because the mean of its divisors is an integer number (32668038).

Almost surely, 2^130605691 is an apocalyptic number.

130605691 is a deficient number, since it is larger than the sum of its proper divisors (66461).

130605691 is an equidigital number, since it uses as much as digits as its factorization.

130605691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66460.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 130605691 is about 11428.2846919387. The cubic root of 130605691 is about 507.3652287592.

The spelling of 130605691 in words is "one hundred thirty million, six hundred five thousand, six hundred ninety-one".