149018905 has 32 divisors (see below), whose sum is σ = 210410496. Its totient is φ = 99201024.

The previous prime is 149018899. The next prime is 149018927. The reversal of 149018905 is 509810941.

It is a cyclic number.

It is not a de Polignac number, because 149018905 - 2³ = 149018897 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 257977 + ... + 258553.

It is an arithmetic number, because the mean of its divisors is an integer number (6575328).

Almost surely, 2^149018905 is an apocalyptic number.

It is an amenable number.

149018905 is a deficient number, since it is larger than the sum of its proper divisors (61391591).

149018905 is a wasteful number, since it uses less digits than its factorization.

149018905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793.

The product of its (nonzero) digits is 12960, while the sum is 37.

The square root of 149018905 is about 12207.3299701450. The cubic root of 149018905 is about 530.1683397856.

The spelling of 149018905 in words is "one hundred forty-nine million, eighteen thousand, nine hundred five".