134491084512509 has 2 divisors, whose sum is σ = 134491084512510. Its totient is φ = 134491084512508.

The previous prime is 134491084512487. The next prime is 134491084512529. The reversal of 134491084512509 is 905215480194431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131501193955609 + 2989890556900 = 11467397^2 + 1729130^2 .

It is a cyclic number.

It is not a de Polignac number, because 134491084512509 - 2¹² = 134491084508413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134491084512529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67245542256254 + 67245542256255.

It is an arithmetic number, because the mean of its divisors is an integer number (67245542256255).

Almost surely, 2^{134491084512509} is an apocalyptic number.

It is an amenable number.

134491084512509 is a deficient number, since it is larger than the sum of its proper divisors (1).

134491084512509 is an equidigital number, since it uses as much as digits as its factorization.

134491084512509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6220800, while the sum is 56.

The spelling of 134491084512509 in words is "one hundred thirty-four trillion, four hundred ninety-one billion, eighty-four million, five hundred twelve thousand, five hundred nine".