149185989 has 32 divisors (see below), whose sum is σ = 225118080. Its totient is φ = 97632000.

The previous prime is 149185979. The next prime is 149186021. The reversal of 149185989 is 989581941.

149185989 is a `hidden beast` number, since 1 + 49 + 1 + 8 + 598 + 9 = 666.

It is not a de Polignac number, because 149185989 - 2⁴ = 149185973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149185969) by changing a digit.

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, 618909 + ... + 619149.

It is an arithmetic number, because the mean of its divisors is an integer number (7034940).

Almost surely, 2^149185989 is an apocalyptic number.

It is an amenable number.

149185989 is a deficient number, since it is larger than the sum of its proper divisors (75932091).

149185989 is a wasteful number, since it uses less digits than its factorization.

149185989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578 (or 572 counting only the distinct ones).

The product of its digits is 933120, while the sum is 54.

The square root of 149185989 is about 12214.1716460839. The cubic root of 149185989 is about 530.3664121050.

The spelling of 149185989 in words is "one hundred forty-nine million, one hundred eighty-five thousand, nine hundred eighty-nine".