149938281 has 6 divisors (see below), whose sum is σ = 216577530. Its totient is φ = 99958848.

The previous prime is 149938241. The next prime is 149938301. The reversal of 149938281 is 182839941.

149938281 is a `hidden beast` number, since 1 + 499 + 3 + 82 + 81 = 666.

It can be written as a sum of positive squares in only one way, i.e., 114832656 + 35105625 = 10716^2 + 5925^2 .

It is not a de Polignac number, because 149938281 - 2⁷ = 149938153 is a prime.

It is a super-2 number, since 2×149938281² = 44962976218469922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (149938241) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8329896 + ... + 8329913.

It is an arithmetic number, because the mean of its divisors is an integer number (36096255).

Almost surely, 2^149938281 is an apocalyptic number.

It is an amenable number.

149938281 is a deficient number, since it is larger than the sum of its proper divisors (66639249).

149938281 is a wasteful number, since it uses less digits than its factorization.

149938281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16659815 (or 16659812 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 149938281 is about 12244.9287870530. The cubic root of 149938281 is about 531.2564010117.

The spelling of 149938281 in words is "one hundred forty-nine million, nine hundred thirty-eight thousand, two hundred eighty-one".