149709389 has 4 divisors (see below), whose sum is σ = 150714300. Its totient is φ = 148704480.

The previous prime is 149709383. The next prime is 149709401. The reversal of 149709389 is 983907941.

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 90573289 + 59136100 = 9517^2 + 7690^2 .

It is a cyclic number.

It is not a de Polignac number, because 149709389 - 2¹⁶ = 149643853 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 (149709383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 502232 + ... + 502529.

It is an arithmetic number, because the mean of its divisors is an integer number (37678575).

Almost surely, 2^149709389 is an apocalyptic number.

It is an amenable number.

149709389 is a deficient number, since it is larger than the sum of its proper divisors (1004911).

149709389 is a wasteful number, since it uses less digits than its factorization.

149709389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1004910.

The product of its (nonzero) digits is 489888, while the sum is 50.

The square root of 149709389 is about 12235.5788175305. The cubic root of 149709389 is about 530.9859291233.

It can be divided in two parts, 149 and 709389, that multiplied together give a square (105698961 = 10281²).

The spelling of 149709389 in words is "one hundred forty-nine million, seven hundred nine thousand, three hundred eighty-nine".