149729509 has 2 divisors, whose sum is σ = 149729510. Its totient is φ = 149729508.

The previous prime is 149729507. The next prime is 149729513. The reversal of 149729509 is 905927941.

It is a happy number.

149729509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126900225 + 22829284 = 11265^2 + 4778^2 .

It is an emirp because it is prime and its reverse (905927941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 149729509 - 2¹ = 149729507 is a prime.

Together with 149729507, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149729507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74864754 + 74864755.

It is an arithmetic number, because the mean of its divisors is an integer number (74864755).

Almost surely, 2^149729509 is an apocalyptic number.

It is an amenable number.

149729509 is a deficient number, since it is larger than the sum of its proper divisors (1).

149729509 is an equidigital number, since it uses as much as digits as its factorization.

149729509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 204120, while the sum is 46.

The square root of 149729509 is about 12236.4009823150. The cubic root of 149729509 is about 531.0097151138.

The spelling of 149729509 in words is "one hundred forty-nine million, seven hundred twenty-nine thousand, five hundred nine".