149709205 has 4 divisors (see below), whose sum is σ = 179651052. Its totient is φ = 119767360.

The previous prime is 149709193. The next prime is 149709233. The reversal of 149709205 is 502907941.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 117548964 + 32160241 = 10842^2 + 5671^2 .

It is not a de Polignac number, because 149709205 - 2⁹ = 149708693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 14970916 + ... + 14970925.

It is an arithmetic number, because the mean of its divisors is an integer number (44912763).

Almost surely, 2^149709205 is an apocalyptic number.

It is an amenable number.

149709205 is a deficient number, since it is larger than the sum of its proper divisors (29941847).

149709205 is an equidigital number, since it uses as much as digits as its factorization.

149709205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29941846.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 149709205 is about 12235.5712984723. The cubic root of 149709205 is about 530.9857115875.

The spelling of 149709205 in words is "one hundred forty-nine million, seven hundred nine thousand, two hundred five".