149023509 has 16 divisors (see below), whose sum is σ = 212163072. Its totient is φ = 92817648.

The previous prime is 149023499. The next prime is 149023519. The reversal of 149023509 is 905320941.

149023509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (149023499) and next prime (149023519).

It is not a de Polignac number, because 149023509 - 2⁸ = 149023253 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 149023509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149023519) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22147 + ... + 28080.

It is an arithmetic number, because the mean of its divisors is an integer number (13260192).

Almost surely, 2^149023509 is an apocalyptic number.

It is an amenable number.

149023509 is a deficient number, since it is larger than the sum of its proper divisors (63139563).

149023509 is a wasteful number, since it uses less digits than its factorization.

149023509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50296.

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 149023509 is about 12207.5185439138. The cubic root of 149023509 is about 530.1737996520.

The spelling of 149023509 in words is "one hundred forty-nine million, twenty-three thousand, five hundred nine".