149273189 has 4 divisors (see below), whose sum is σ = 160755756. Its totient is φ = 137790624.

The previous prime is 149273149. The next prime is 149273219. The reversal of 149273189 is 981372941.

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 87572164 + 61701025 = 9358^2 + 7855^2 .

It is a cyclic number.

It is not a de Polignac number, because 149273189 - 2¹² = 149269093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149273129) 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, 5741264 + ... + 5741289.

It is an arithmetic number, because the mean of its divisors is an integer number (40188939).

Almost surely, 2^149273189 is an apocalyptic number.

It is an amenable number.

149273189 is a deficient number, since it is larger than the sum of its proper divisors (11482567).

149273189 is a wasteful number, since it uses less digits than its factorization.

149273189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11482566.

The product of its digits is 108864, while the sum is 44.

The square root of 149273189 is about 12217.7407486000. The cubic root of 149273189 is about 530.4697259699.

The spelling of 149273189 in words is "one hundred forty-nine million, two hundred seventy-three thousand, one hundred eighty-nine".