149634981 has 12 divisors (see below), whose sum is σ = 220738752. Its totient is φ = 97633896.

The previous prime is 149634977. The next prime is 149635019. The reversal of 149634981 is 189436941.

149634981 is a `hidden beast` number, since 1 + 4 + 9 + 634 + 9 + 8 + 1 = 666.

It is not a de Polignac number, because 149634981 - 2² = 149634977 is a prime.

It is a super-2 number, since 2×149634981² = 44781255077740722, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149634911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 176451 + ... + 177296.

It is an arithmetic number, because the mean of its divisors is an integer number (18394896).

Almost surely, 2^149634981 is an apocalyptic number.

It is an amenable number.

149634981 is a deficient number, since it is larger than the sum of its proper divisors (71103771).

149634981 is a wasteful number, since it uses less digits than its factorization.

149634981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353800 (or 353797 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 149634981 is about 12232.5377988380. The cubic root of 149634981 is about 530.8979449990.

The spelling of 149634981 in words is "one hundred forty-nine million, six hundred thirty-four thousand, nine hundred eighty-one".