913989709 has 16 divisors (see below), whose sum is σ = 1001226240. Its totient is φ = 831671280.

The previous prime is 913989689. The next prime is 913989719. The reversal of 913989709 is 907989319.

913989709 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 913989709 - 2²¹ = 911892557 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 913989709.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (913989719) 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, 31204 + ... + 52930.

It is an arithmetic number, because the mean of its divisors is an integer number (62576640).

Almost surely, 2^913989709 is an apocalyptic number.

It is an amenable number.

913989709 is a deficient number, since it is larger than the sum of its proper divisors (87236531).

913989709 is a wasteful number, since it uses less digits than its factorization.

913989709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21840.

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

The square root of 913989709 is about 30232.2627171702. The cubic root of 913989709 is about 970.4662473177.

The spelling of 913989709 in words is "nine hundred thirteen million, nine hundred eighty-nine thousand, seven hundred nine".