149708905 has 4 divisors (see below), whose sum is σ = 179650692. Its totient is φ = 119767120.

The previous prime is 149708893. The next prime is 149708921. The reversal of 149708905 is 509807941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 509807941 = 37 ⋅13778593.

It can be written as a sum of positive squares in 2 ways, for example, as 78340201 + 71368704 = 8851^2 + 8448^2 .

It is not a de Polignac number, because 149708905 - 2¹¹ = 149706857 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, 14970886 + ... + 14970895.

It is an arithmetic number, because the mean of its divisors is an integer number (44912673).

Almost surely, 2^149708905 is an apocalyptic number.

It is an amenable number.

149708905 is a deficient number, since it is larger than the sum of its proper divisors (29941787).

149708905 is an equidigital number, since it uses as much as digits as its factorization.

149708905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29941786.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 149708905 is about 12235.5590391285. The cubic root of 149708905 is about 530.9853569092.

The spelling of 149708905 in words is "one hundred forty-nine million, seven hundred eight thousand, nine hundred five".