961050509 has 4 divisors (see below), whose sum is σ = 961534716. Its totient is φ = 960566304.

The previous prime is 961050449. The next prime is 961050521. The reversal of 961050509 is 905050169.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 461304484 + 499746025 = 21478^2 + 22355^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-961050509 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (961050589) 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, 239114 + ... + 243099.

It is an arithmetic number, because the mean of its divisors is an integer number (240383679).

Almost surely, 2^961050509 is an apocalyptic number.

It is an amenable number.

961050509 is a deficient number, since it is larger than the sum of its proper divisors (484207).

961050509 is a wasteful number, since it uses less digits than its factorization.

961050509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484206.

The product of its (nonzero) digits is 12150, while the sum is 35.

The square root of 961050509 is about 31000.8146505862. The cubic root of 961050509 is about 986.8445288352.

The spelling of 961050509 in words is "nine hundred sixty-one million, fifty thousand, five hundred nine".