149505905 has 8 divisors (see below), whose sum is σ = 189960552. Its totient is φ = 112569088.

The previous prime is 149505869. The next prime is 149505943. The reversal of 149505905 is 509505941.

149505905 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 46117681 + 103388224 = 6791^2 + 10168^2 .

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 149505905 - 2⁸ = 149505649 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 879362 + ... + 879531.

It is an arithmetic number, because the mean of its divisors is an integer number (23745069).

Almost surely, 2^149505905 is an apocalyptic number.

It is an amenable number.

149505905 is a deficient number, since it is larger than the sum of its proper divisors (40454647).

149505905 is a wasteful number, since it uses less digits than its factorization.

149505905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1758915.

The product of its (nonzero) digits is 40500, while the sum is 38.

The square root of 149505905 is about 12227.2607316602. The cubic root of 149505905 is about 530.7452492059.

The spelling of 149505905 in words is "one hundred forty-nine million, five hundred five thousand, nine hundred five".