909421137 has 12 divisors (see below), whose sum is σ = 1390879620. Its totient is φ = 570617088.

The previous prime is 909421133. The next prime is 909421151. The reversal of 909421137 is 731124909.

It can be written as a sum of positive squares in 2 ways, for example, as 658230336 + 251190801 = 25656^2 + 15849^2 .

It is not a de Polignac number, because 909421137 - 2² = 909421133 is a prime.

It is not an unprimeable number, because it can be changed into a prime (909421133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2971812 + ... + 2972117.

It is an arithmetic number, because the mean of its divisors is an integer number (115906635).

Almost surely, 2^909421137 is an apocalyptic number.

It is an amenable number.

909421137 is a deficient number, since it is larger than the sum of its proper divisors (481458483).

909421137 is a wasteful number, since it uses less digits than its factorization.

909421137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5943952 (or 5943949 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 909421137 is about 30156.6101709061. The cubic root of 909421137 is about 968.8465891511.

The spelling of 909421137 in words is "nine hundred nine million, four hundred twenty-one thousand, one hundred thirty-seven".