134890509 has 8 divisors (see below), whose sum is σ = 193688992. Its totient is φ = 83009520.

The previous prime is 134890507. The next prime is 134890537. The reversal of 134890509 is 905098431.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 134890509 - 2¹ = 134890507 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 3458731 = 134890509 / (1 + 3 + 4 + 8 + 9 + 0 + 5 + 0 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134890507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1729327 + ... + 1729404.

It is an arithmetic number, because the mean of its divisors is an integer number (24211124).

Almost surely, 2^134890509 is an apocalyptic number.

It is an amenable number.

134890509 is a deficient number, since it is larger than the sum of its proper divisors (58798483).

134890509 is a wasteful number, since it uses less digits than its factorization.

134890509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3458747.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 134890509 is about 11614.2373404370. The cubic root of 134890509 is about 512.8540598433.

The spelling of 134890509 in words is "one hundred thirty-four million, eight hundred ninety thousand, five hundred nine".