134444201891 has 2 divisors, whose sum is σ = 134444201892. Its totient is φ = 134444201890.

The previous prime is 134444201873. The next prime is 134444201911. The reversal of 134444201891 is 198102444431.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-134444201891 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (134444201821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67222100945 + 67222100946.

It is an arithmetic number, because the mean of its divisors is an integer number (67222100946).

Almost surely, 2^134444201891 is an apocalyptic number.

134444201891 is a deficient number, since it is larger than the sum of its proper divisors (1).

134444201891 is an equidigital number, since it uses as much as digits as its factorization.

134444201891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 110592, while the sum is 41.

The spelling of 134444201891 in words is "one hundred thirty-four billion, four hundred forty-four million, two hundred one thousand, eight hundred ninety-one".