134989891 has 2 divisors, whose sum is σ = 134989892. Its totient is φ = 134989890.

The previous prime is 134989873. The next prime is 134989901. The reversal of 134989891 is 198989431.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 134989891 - 2¹³ = 134981699 is a prime.

It is not a weakly prime, because it can be changed into another prime (134989831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67494945 + 67494946.

It is an arithmetic number, because the mean of its divisors is an integer number (67494946).

Almost surely, 2^134989891 is an apocalyptic number.

134989891 is a deficient number, since it is larger than the sum of its proper divisors (1).

134989891 is an equidigital number, since it uses as much as digits as its factorization.

134989891 is an evil number, because the sum of its binary digits is even.

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

The square root of 134989891 is about 11618.5150083821. The cubic root of 134989891 is about 512.9799791302.

It can be divided in two parts, 134 and 989891, that added together give a square (990025 = 995²).

The spelling of 134989891 in words is "one hundred thirty-four million, nine hundred eighty-nine thousand, eight hundred ninety-one".