149839905 has 8 divisors (see below), whose sum is σ = 239743872. Its totient is φ = 79914608.

The previous prime is 149839849. The next prime is 149839927. The reversal of 149839905 is 509938941.

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 149839905 - 2⁶ = 149839841 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4994649 + ... + 4994678.

It is an arithmetic number, because the mean of its divisors is an integer number (29967984).

Almost surely, 2^149839905 is an apocalyptic number.

149839905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

149839905 is a deficient number, since it is larger than the sum of its proper divisors (89903967).

149839905 is an equidigital number, since it uses as much as digits as its factorization.

149839905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9989335.

The product of its (nonzero) digits is 349920, while the sum is 48.

The square root of 149839905 is about 12240.9111180500. The cubic root of 149839905 is about 531.1401880526.

The spelling of 149839905 in words is "one hundred forty-nine million, eight hundred thirty-nine thousand, nine hundred five".