149549905 has 4 divisors (see below), whose sum is σ = 179459892. Its totient is φ = 119639920.

The previous prime is 149549891. The next prime is 149549951. The reversal of 149549905 is 509945941.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 509945941 = 83 ⋅6143927.

It can be written as a sum of positive squares in 2 ways, for example, as 51955264 + 97594641 = 7208^2 + 9879^2 .

It is not a de Polignac number, because 149549905 - 2¹³ = 149541713 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14954986 + ... + 14954995.

It is an arithmetic number, because the mean of its divisors is an integer number (44864973).

Almost surely, 2^149549905 is an apocalyptic number.

It is an amenable number.

149549905 is a deficient number, since it is larger than the sum of its proper divisors (29909987).

149549905 is an equidigital number, since it uses as much as digits as its factorization.

149549905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29909986.

The product of its (nonzero) digits is 291600, while the sum is 46.

The square root of 149549905 is about 12229.0598575688. The cubic root of 149549905 is about 530.7973106957.

The spelling of 149549905 in words is "one hundred forty-nine million, five hundred forty-nine thousand, nine hundred five".