134490409 has 3 divisors (see below), whose sum is σ = 134502007. Its totient is φ = 134478812.

The previous prime is 134490353. The next prime is 134490427. The reversal of 134490409 is 904094431.

The square root of 134490409 is 11597.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 904094431 = 307 ⋅2944933.

It can be written as a sum of positive squares in only one way, i.e., 118265625 + 16224784 = 10875^2 + 4028^2 .

It is not a de Polignac number, because 134490409 - 2¹³ = 134482217 is a prime.

It is a super-2 number, since 2×134490409² = 36175340225974562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (134490479) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 5799 + ... + 17395.

Almost surely, 2^134490409 is an apocalyptic number.

134490409 is the 11597-th square number.

134490409 is the 5799-th centered octagonal number.

It is an amenable number.

134490409 is a deficient number, since it is larger than the sum of its proper divisors (11598).

134490409 is an frugal number, since it uses more digits than its factorization.

134490409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23194 (or 11597 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 34.

The cubic root of 134490409 is about 512.3464972759.

The spelling of 134490409 in words is "one hundred thirty-four million, four hundred ninety thousand, four hundred nine".