965722009 has 16 divisors (see below), whose sum is σ = 1180666368. Its totient is φ = 771028992.

The previous prime is 965722007. The next prime is 965722031. The reversal of 965722009 is 900227569.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 965722009 - 2¹ = 965722007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (965722007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30289 + ... + 53374.

It is an arithmetic number, because the mean of its divisors is an integer number (73791648).

Almost surely, 2^965722009 is an apocalyptic number.

It is an amenable number.

965722009 is a deficient number, since it is larger than the sum of its proper divisors (214944359).

965722009 is a wasteful number, since it uses less digits than its factorization.

965722009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83784.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 965722009 is about 31076.0681071464. The cubic root of 965722009 is about 988.4409051399.

The spelling of 965722009 in words is "nine hundred sixty-five million, seven hundred twenty-two thousand, nine".