913229809 has 4 divisors (see below), whose sum is σ = 924789760. Its totient is φ = 901669860.

The previous prime is 913229797. The next prime is 913229879. The reversal of 913229809 is 908922319.

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, and also an emirpimes, since its reverse is a distinct semiprime: 908922319 = 281 ⋅3234599.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-913229809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (913229879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5779857 + ... + 5780014.

It is an arithmetic number, because the mean of its divisors is an integer number (231197440).

Almost surely, 2^913229809 is an apocalyptic number.

It is an amenable number.

913229809 is a deficient number, since it is larger than the sum of its proper divisors (11559951).

913229809 is a wasteful number, since it uses less digits than its factorization.

913229809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11559950.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 913229809 is about 30219.6924041262. The cubic root of 913229809 is about 970.1972210311.

The spelling of 913229809 in words is "nine hundred thirteen million, two hundred twenty-nine thousand, eight hundred nine".