149057509 has 8 divisors (see below), whose sum is σ = 154049112. Its totient is φ = 144130560.

The previous prime is 149057501. The next prime is 149057543. The reversal of 149057509 is 905750941.

It can be written as a sum of positive squares in 4 ways, for example, as 10336225 + 138721284 = 3215^2 + 11778^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 149057509 - 2³ = 149057501 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 (149057501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11454 + ... + 20719.

It is an arithmetic number, because the mean of its divisors is an integer number (19256139).

Almost surely, 2^149057509 is an apocalyptic number.

It is an amenable number.

149057509 is a deficient number, since it is larger than the sum of its proper divisors (4991603).

149057509 is a wasteful number, since it uses less digits than its factorization.

149057509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32327.

The product of its (nonzero) digits is 56700, while the sum is 40.

The square root of 149057509 is about 12208.9110489019. The cubic root of 149057509 is about 530.2141166431.

The spelling of 149057509 in words is "one hundred forty-nine million, fifty-seven thousand, five hundred nine".