149805439 has 16 divisors (see below), whose sum is σ = 173352960. Its totient is φ = 126806400.

The previous prime is 149805437. The next prime is 149805511. The reversal of 149805439 is 934508941.

It is a happy number.

It is not a de Polignac number, because 149805439 - 2¹ = 149805437 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 149805395 and 149805404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149805437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 252327 + ... + 252919.

It is an arithmetic number, because the mean of its divisors is an integer number (10834560).

Almost surely, 2^149805439 is an apocalyptic number.

149805439 is a deficient number, since it is larger than the sum of its proper divisors (23547521).

149805439 is a wasteful number, since it uses less digits than its factorization.

149805439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 990.

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 149805439 is about 12239.5032170428. The cubic root of 149805439 is about 531.0994608478.

The spelling of 149805439 in words is "one hundred forty-nine million, eight hundred five thousand, four hundred thirty-nine".