909071649 has 6 divisors (see below), whose sum is σ = 1313103506. Its totient is φ = 606047760.

The previous prime is 909071629. The next prime is 909071659. The reversal of 909071649 is 946170909.

909071649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 907937424 + 1134225 = 30132^2 + 1065^2 .

It is not a de Polignac number, because 909071649 - 2¹⁷ = 908940577 is a prime.

It is a super-2 number, since 2×909071649² = 1652822526031158402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (909071629) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 50503972 + ... + 50503989.

Almost surely, 2^909071649 is an apocalyptic number.

It is an amenable number.

909071649 is a deficient number, since it is larger than the sum of its proper divisors (404031857).

909071649 is a wasteful number, since it uses less digits than its factorization.

909071649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101007967 (or 101007964 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 909071649 is about 30150.8150636098. The cubic root of 909071649 is about 968.7224649045.

The spelling of 909071649 in words is "nine hundred nine million, seventy-one thousand, six hundred forty-nine".