909149 has 4 divisors (see below), whose sum is σ = 930336. Its totient is φ = 887964.

The previous prime is 909133. The next prime is 909151. The reversal of 909149 is 941909.

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: 941909 = 37 ⋅25457.

It is a cyclic number.

It is not a de Polignac number, because 909149 - 2⁴ = 909133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (909119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10529 + ... + 10614.

It is an arithmetic number, because the mean of its divisors is an integer number (232584).

2⁹⁰⁹¹⁴⁹ is an apocalyptic number.

It is an amenable number.

909149 is a deficient number, since it is larger than the sum of its proper divisors (21187).

909149 is a wasteful number, since it uses less digits than its factorization.

909149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21186.

The product of its (nonzero) digits is 2916, while the sum is 32.

The square root of 909149 is about 953.4930518887. The cubic root of 909149 is about 96.8749939646.

The spelling of 909149 in words is "nine hundred nine thousand, one hundred forty-nine".