130691805 has 16 divisors (see below), whose sum is σ = 214208064. Its totient is φ = 68001920.

The previous prime is 130691791. The next prime is 130691837. The reversal of 130691805 is 508196031.

It is not a de Polignac number, because 130691805 - 2⁴ = 130691789 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105639 + ... + 106868.

It is an arithmetic number, because the mean of its divisors is an integer number (13388004).

Almost surely, 2^130691805 is an apocalyptic number.

130691805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

130691805 is a deficient number, since it is larger than the sum of its proper divisors (83516259).

130691805 is a wasteful number, since it uses less digits than its factorization.

130691805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212556.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 130691805 is about 11432.0516531373. The cubic root of 130691805 is about 507.4767135651.

The spelling of 130691805 in words is "one hundred thirty million, six hundred ninety-one thousand, eight hundred five".