149784009 has 4 divisors (see below), whose sum is σ = 199712016. Its totient is φ = 99856004.

The previous prime is 149784001. The next prime is 149784017. The reversal of 149784009 is 900487941.

149784009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 an interprime number because it is at equal distance from previous prime (149784001) and next prime (149784017).

It is a cyclic number.

It is not a de Polignac number, because 149784009 - 2³ = 149784001 is a prime.

It is a super-2 number, since 2×149784009² = 44870498704224162, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (149784001) 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, 24963999 + ... + 24964004.

It is an arithmetic number, because the mean of its divisors is an integer number (49928004).

Almost surely, 2^149784009 is an apocalyptic number.

It is an amenable number.

149784009 is a deficient number, since it is larger than the sum of its proper divisors (49928007).

149784009 is an equidigital number, since it uses as much as digits as its factorization.

149784009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49928006.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 149784009 is about 12238.6277417037. The cubic root of 149784009 is about 531.0741346552.

The spelling of 149784009 in words is "one hundred forty-nine million, seven hundred eighty-four thousand, nine".