134191639 has 2 divisors, whose sum is σ = 134191640. Its totient is φ = 134191638.

The previous prime is 134191621. The next prime is 134191649. The reversal of 134191639 is 936191431.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-134191639 is a prime.

It is a Chen prime.

It is a nialpdrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 134191598 and 134191607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134191649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67095819 + 67095820.

It is an arithmetic number, because the mean of its divisors is an integer number (67095820).

Almost surely, 2^134191639 is an apocalyptic number.

134191639 is a deficient number, since it is larger than the sum of its proper divisors (1).

134191639 is an equidigital number, since it uses as much as digits as its factorization.

134191639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17496, while the sum is 37.

The square root of 134191639 is about 11584.1114894497. Note that the first 3 decimals coincide. The cubic root of 134191639 is about 511.9668239714.

The spelling of 134191639 in words is "one hundred thirty-four million, one hundred ninety-one thousand, six hundred thirty-nine".