917229009 has 16 divisors (see below), whose sum is σ = 1293824000. Its totient is φ = 576384336.

The previous prime is 917228989. The next prime is 917229031. The reversal of 917229009 is 900922719.

It is a happy number.

It is not a de Polignac number, because 917229009 - 2¹³ = 917220817 is a prime.

It is a super-2 number, since 2×917229009² = 1682618109902244162, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (917229059) 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, 29089 + ... + 51774.

It is an arithmetic number, because the mean of its divisors is an integer number (80864000).

Almost surely, 2^917229009 is an apocalyptic number.

It is an amenable number.

917229009 is a deficient number, since it is larger than the sum of its proper divisors (376594991).

917229009 is a wasteful number, since it uses less digits than its factorization.

917229009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81084.

The product of its (nonzero) digits is 20412, while the sum is 39.

The square root of 917229009 is about 30285.7888951237. The cubic root of 917229009 is about 971.6113823102.

The spelling of 917229009 in words is "nine hundred seventeen million, two hundred twenty-nine thousand, nine".