149270909 has 4 divisors (see below), whose sum is σ = 149380380. Its totient is φ = 149161440.

The previous prime is 149270903. The next prime is 149270923. The reversal of 149270909 is 909072941.

It is a happy number.

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 76510009 + 72760900 = 8747^2 + 8530^2 .

It is a cyclic number.

It is not a de Polignac number, because 149270909 - 2¹⁶ = 149205373 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149270903) 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, 52664 + ... + 55425.

It is an arithmetic number, because the mean of its divisors is an integer number (37345095).

Almost surely, 2^149270909 is an apocalyptic number.

It is an amenable number.

149270909 is a deficient number, since it is larger than the sum of its proper divisors (109471).

149270909 is a wasteful number, since it uses less digits than its factorization.

149270909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109470.

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 149270909 is about 12217.6474413039. The cubic root of 149270909 is about 530.4670251564.

The spelling of 149270909 in words is "one hundred forty-nine million, two hundred seventy thousand, nine hundred nine".