913789909 has 2 divisors, whose sum is σ = 913789910. Its totient is φ = 913789908.

The previous prime is 913789901. The next prime is 913789927. The reversal of 913789909 is 909987319.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 721191025 + 192598884 = 26855^2 + 13878^2 .

It is a cyclic number.

It is not a de Polignac number, because 913789909 - 2³ = 913789901 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 913789909.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (913789901) 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 as a sum of consecutive naturals, namely, 456894954 + 456894955.

It is an arithmetic number, because the mean of its divisors is an integer number (456894955).

Almost surely, 2^913789909 is an apocalyptic number.

It is an amenable number.

913789909 is a deficient number, since it is larger than the sum of its proper divisors (1).

913789909 is an equidigital number, since it uses as much as digits as its factorization.

913789909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1102248, while the sum is 55.

The square root of 913789909 is about 30228.9581196574. The cubic root of 913789909 is about 970.3955268691.

The spelling of 913789909 in words is "nine hundred thirteen million, seven hundred eighty-nine thousand, nine hundred nine".