130691641 has 4 divisors (see below), whose sum is σ = 133879284. Its totient is φ = 127504000.

The previous prime is 130691623. The next prime is 130691669. The reversal of 130691641 is 146196031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 146196031 = 31 ⋅4716001.

It can be written as a sum of positive squares in 2 ways, for example, as 12752041 + 117939600 = 3571^2 + 10860^2 .

It is a cyclic number.

It is not a de Polignac number, because 130691641 - 2⁷ = 130691513 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 (130691621) 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, 1593760 + ... + 1593841.

It is an arithmetic number, because the mean of its divisors is an integer number (33469821).

Almost surely, 2^130691641 is an apocalyptic number.

It is an amenable number.

130691641 is a deficient number, since it is larger than the sum of its proper divisors (3187643).

130691641 is an equidigital number, since it uses as much as digits as its factorization.

130691641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3187642.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 130691641 is about 11432.0444803193. The cubic root of 130691641 is about 507.4765012941.

The spelling of 130691641 in words is "one hundred thirty million, six hundred ninety-one thousand, six hundred forty-one".