131889569 has 4 divisors (see below), whose sum is σ = 150730944. Its totient is φ = 113048196.

The previous prime is 131889547. The next prime is 131889581. The reversal of 131889569 is 965988131.

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 not a de Polignac number, because 131889569 - 2⁸ = 131889313 is a prime.

It is a super-2 number, since 2×131889569² = 34789716822011522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (131889509) 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, 9420677 + ... + 9420690.

It is an arithmetic number, because the mean of its divisors is an integer number (37682736).

Almost surely, 2^131889569 is an apocalyptic number.

It is an amenable number.

131889569 is a deficient number, since it is larger than the sum of its proper divisors (18841375).

131889569 is an equidigital number, since it uses as much as digits as its factorization.

131889569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18841374.

The product of its digits is 466560, while the sum is 50.

The square root of 131889569 is about 11484.3183950986. The cubic root of 131889569 is about 509.0223086474.

The spelling of 131889569 in words is "one hundred thirty-one million, eight hundred eighty-nine thousand, five hundred sixty-nine".