149845609 has 8 divisors (see below), whose sum is σ = 158156000. Its totient is φ = 141577632.

The previous prime is 149845603. The next prime is 149845711. The reversal of 149845609 is 906548941.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 149845609 - 2⁷ = 149845481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (149845603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3204 + ... + 17605.

It is an arithmetic number, because the mean of its divisors is an integer number (19769500).

Almost surely, 2^149845609 is an apocalyptic number.

149845609 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

149845609 is a deficient number, since it is larger than the sum of its proper divisors (8310391).

149845609 is a wasteful number, since it uses less digits than its factorization.

149845609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21207.

The product of its (nonzero) digits is 311040, while the sum is 46.

The square root of 149845609 is about 12241.1441050255. The cubic root of 149845609 is about 531.1469276573.

The spelling of 149845609 in words is "one hundred forty-nine million, eight hundred forty-five thousand, six hundred nine".