131889071 has 4 divisors (see below), whose sum is σ = 136437000. Its totient is φ = 127341144.

The previous prime is 131889067. The next prime is 131889073. The reversal of 131889071 is 170988131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 170988131 = 991 ⋅172541.

It is a cyclic number.

It is not a de Polignac number, because 131889071 - 2² = 131889067 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131889073) 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, 2273921 + ... + 2273978.

It is an arithmetic number, because the mean of its divisors is an integer number (34109250).

Almost surely, 2^131889071 is an apocalyptic number.

131889071 is a deficient number, since it is larger than the sum of its proper divisors (4547929).

131889071 is an equidigital number, since it uses as much as digits as its factorization.

131889071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4547928.

The product of its (nonzero) digits is 12096, while the sum is 38.

The square root of 131889071 is about 11484.2967133386. The cubic root of 131889071 is about 509.0216679765.

The spelling of 131889071 in words is "one hundred thirty-one million, eight hundred eighty-nine thousand, seventy-one".