149190809 has 8 divisors (see below), whose sum is σ = 151937280. Its totient is φ = 146462400.

The previous prime is 149190799. The next prime is 149190823. The reversal of 149190809 is 908091941.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149190809 is a prime.

It is a house number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149193809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12752 + ... + 21470.

It is an arithmetic number, because the mean of its divisors is an integer number (18992160).

Almost surely, 2^149190809 is an apocalyptic number.

It is an amenable number.

149190809 is a deficient number, since it is larger than the sum of its proper divisors (2746471).

149190809 is an equidigital number, since it uses as much as digits as its factorization.

149190809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9031.

The product of its (nonzero) digits is 23328, while the sum is 41.

The square root of 149190809 is about 12214.3689562744. The cubic root of 149190809 is about 530.3721238535.

The spelling of 149190809 in words is "one hundred forty-nine million, one hundred ninety thousand, eight hundred nine".