131191893 has 20 divisors (see below), whose sum is σ = 223975840. Its totient is φ = 74966472.

The previous prime is 131191891. The next prime is 131191897. The reversal of 131191893 is 398191131.

It is not a de Polignac number, because 131191893 - 2¹ = 131191891 is a prime.

It is a super-2 number, since 2×131191893² = 34422625577846898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131191891) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 115123 + ... + 116256.

It is an arithmetic number, because the mean of its divisors is an integer number (11198792).

Almost surely, 2^131191893 is an apocalyptic number.

It is an amenable number.

131191893 is a deficient number, since it is larger than the sum of its proper divisors (92783947).

131191893 is an equidigital number, since it uses as much as digits as its factorization.

131191893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231398 (or 231389 counting only the distinct ones).

The product of its digits is 5832, while the sum is 36.

The square root of 131191893 is about 11453.9029592537. The cubic root of 131191893 is about 508.1231708380.

The spelling of 131191893 in words is "one hundred thirty-one million, one hundred ninety-one thousand, eight hundred ninety-three".