131388133 has 4 divisors (see below), whose sum is σ = 131785408. Its totient is φ = 130990860.

The previous prime is 131388107. The next prime is 131388157. The reversal of 131388133 is 331883131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131388133 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131388095 and 131388104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131388193) 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, 198141 + ... + 198802.

It is an arithmetic number, because the mean of its divisors is an integer number (32946352).

Almost surely, 2^131388133 is an apocalyptic number.

It is an amenable number.

131388133 is a deficient number, since it is larger than the sum of its proper divisors (397275).

131388133 is an equidigital number, since it uses as much as digits as its factorization.

131388133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397274.

The product of its digits is 5184, while the sum is 31.

The square root of 131388133 is about 11462.4662703975. The cubic root of 131388133 is about 508.3763989194.

The spelling of 131388133 in words is "one hundred thirty-one million, three hundred eighty-eight thousand, one hundred thirty-three".