149009 has 6 divisors (see below), whose sum is σ = 173394. Its totient is φ = 127680.

The previous prime is 148997. The next prime is 149011. The reversal of 149009 is 900941.

It can be written as a sum of positive squares in only one way, i.e., 148225 + 784 = 385^2 + 28^2 .

It is a de Polignac number, because none of the positive numbers 2^k-149009 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 149009.

It is not an unprimeable number, because it can be changed into a prime (149059) 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, 1472 + ... + 1569.

It is an arithmetic number, because the mean of its divisors is an integer number (28899).

2¹⁴⁹⁰⁰⁹ is an apocalyptic number.

It is an amenable number.

149009 is a deficient number, since it is larger than the sum of its proper divisors (24385).

149009 is an equidigital number, since it uses as much as digits as its factorization.

149009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3055 (or 3048 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 149009 is about 386.0168390109. The cubic root of 149009 is about 53.0156593102.

The spelling of 149009 in words is "one hundred forty-nine thousand, nine".