919159229 has 2 divisors, whose sum is σ = 919159230. Its totient is φ = 919159228.

The previous prime is 919159223. The next prime is 919159237. The reversal of 919159229 is 922951919.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 543962329 + 375196900 = 23323^2 + 19370^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-919159229 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (919159223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 459579614 + 459579615.

It is an arithmetic number, because the mean of its divisors is an integer number (459579615).

Almost surely, 2^919159229 is an apocalyptic number.

It is an amenable number.

919159229 is a deficient number, since it is larger than the sum of its proper divisors (1).

919159229 is an equidigital number, since it uses as much as digits as its factorization.

919159229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 131220, while the sum is 47.

The square root of 919159229 is about 30317.6389087277. The cubic root of 919159229 is about 972.2924589335.

The spelling of 919159229 in words is "nine hundred nineteen million, one hundred fifty-nine thousand, two hundred twenty-nine".