134787889 has 4 divisors (see below), whose sum is σ = 140648256. Its totient is φ = 128927524.

The previous prime is 134787859. The next prime is 134787901. The reversal of 134787889 is 988787431.

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, and also an emirpimes, since its reverse is a distinct semiprime: 988787431 = 59 ⋅16759109.

It is a cyclic number.

It is not a de Polignac number, because 134787889 - 2⁷ = 134787761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (134787859) 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, 2930149 + ... + 2930194.

It is an arithmetic number, because the mean of its divisors is an integer number (35162064).

Almost surely, 2^134787889 is an apocalyptic number.

It is an amenable number.

134787889 is a deficient number, since it is larger than the sum of its proper divisors (5860367).

134787889 is an equidigital number, since it uses as much as digits as its factorization.

134787889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5860366.

The product of its digits is 2709504, while the sum is 55.

The square root of 134787889 is about 11609.8186463011. The cubic root of 134787889 is about 512.7239730151.

The spelling of 134787889 in words is "one hundred thirty-four million, seven hundred eighty-seven thousand, eight hundred eighty-nine".