149920138 has 8 divisors (see below), whose sum is σ = 228236832. Its totient is φ = 73841196.

The previous prime is 149920103. The next prime is 149920139. The reversal of 149920138 is 831029941.

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 = 149920097 and 149920106.

It is not an unprimeable number, because it can be changed into a prime (149920139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 559270 + ... + 559537.

It is an arithmetic number, because the mean of its divisors is an integer number (28529604).

Almost surely, 2^149920138 is an apocalyptic number.

149920138 is a deficient number, since it is larger than the sum of its proper divisors (78316694).

149920138 is a wasteful number, since it uses less digits than its factorization.

149920138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1118876.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 149920138 is about 12244.1879273392. The cubic root of 149920138 is about 531.2349722531.

The spelling of 149920138 in words is "one hundred forty-nine million, nine hundred twenty thousand, one hundred thirty-eight".