149968138 has 8 divisors (see below), whose sum is σ = 225084132. Its totient is φ = 74940096.

The previous prime is 149968109. The next prime is 149968151. The reversal of 149968138 is 831869941.

It can be written as a sum of positive squares in 2 ways, for example, as 141919569 + 8048569 = 11913^2 + 2837^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 149968091 and 149968100.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17545 + ... + 24652.

Almost surely, 2^149968138 is an apocalyptic number.

149968138 is a deficient number, since it is larger than the sum of its proper divisors (75115994).

149968138 is a wasteful number, since it uses less digits than its factorization.

149968138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43976.

The product of its digits is 373248, while the sum is 49.

The square root of 149968138 is about 12246.1478841307. The cubic root of 149968138 is about 531.2916614525.

The spelling of 149968138 in words is "one hundred forty-nine million, nine hundred sixty-eight thousand, one hundred thirty-eight".