131994889 has 8 divisors (see below), whose sum is σ = 142276680. Its totient is φ = 121731456.

The previous prime is 131994887. The next prime is 131994899. The reversal of 131994889 is 988499131.

It can be written as a sum of positive squares in 4 ways, for example, as 3920400 + 128074489 = 1980^2 + 11317^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131994889 - 2¹ = 131994887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131994883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12819 + ... + 20695.

It is an arithmetic number, because the mean of its divisors is an integer number (17784585).

Almost surely, 2^131994889 is an apocalyptic number.

It is an amenable number.

131994889 is a deficient number, since it is larger than the sum of its proper divisors (10281791).

131994889 is a wasteful number, since it uses less digits than its factorization.

131994889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9179.

The product of its digits is 559872, while the sum is 52.

The square root of 131994889 is about 11488.9028631980. The cubic root of 131994889 is about 509.1577653182.

The spelling of 131994889 in words is "one hundred thirty-one million, nine hundred ninety-four thousand, eight hundred eighty-nine".