834395509 has 4 divisors (see below), whose sum is σ = 834529504. Its totient is φ = 834261516.

The previous prime is 834395459. The next prime is 834395531. The reversal of 834395509 is 905593438.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 834395509 - 2¹³ = 834387317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (834395539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57177 + ... + 70270.

It is an arithmetic number, because the mean of its divisors is an integer number (208632376).

Almost surely, 2^834395509 is an apocalyptic number.

It is an amenable number.

834395509 is a deficient number, since it is larger than the sum of its proper divisors (133995).

834395509 is a wasteful number, since it uses less digits than its factorization.

834395509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133994.

The product of its (nonzero) digits is 583200, while the sum is 46.

The square root of 834395509 is about 28885.9050230385. The cubic root of 834395509 is about 941.4356773589.

The spelling of 834395509 in words is "eight hundred thirty-four million, three hundred ninety-five thousand, five hundred nine".