149609 has 6 divisors (see below), whose sum is σ = 155070. Its totient is φ = 144320.

The previous prime is 149603. The next prime is 149623. The reversal of 149609 is 906941.

149609 is nontrivially palindromic in base 13.

It can be written as a sum of positive squares in 3 ways, for example, as 16384 + 133225 = 128^2 + 365^2 .

It is not a de Polignac number, because 149609 - 2¹² = 145513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1637 + ... + 1725.

It is an arithmetic number, because the mean of its divisors is an integer number (25845).

2¹⁴⁹⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

149609 is a deficient number, since it is larger than the sum of its proper divisors (5461).

149609 is an frugal number, since it uses more digits than its factorization.

149609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171 (or 130 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 149609 is about 386.7932264143. The cubic root of 149609 is about 53.0867216761.

The spelling of 149609 in words is "one hundred forty-nine thousand, six hundred nine".