901109 has 4 divisors (see below), whose sum is σ = 983040. Its totient is φ = 819180.

The previous prime is 901097. The next prime is 901111.

901109 = T₂₁₇ + T₂₁₈ + ... + T₂₄₉.

901109 is nontrivially palindromic in base 10.

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.

It is a cyclic number.

It is not a de Polignac number, because 901109 - 2⁴ = 901093 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (901169) 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, 40949 + ... + 40970.

It is an arithmetic number, because the mean of its divisors is an integer number (245760).

2⁹⁰¹¹⁰⁹ is an apocalyptic number.

It is an amenable number.

901109 is a deficient number, since it is larger than the sum of its proper divisors (81931).

901109 is a wasteful number, since it uses less digits than its factorization.

901109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81930.

The product of its (nonzero) digits is 81, while the sum is 20.

The square root of 901109 is about 949.2676124255. The cubic root of 901109 is about 96.5885787656.

The spelling of 901109 in words is "nine hundred one thousand, one hundred nine".