138173950 has 24 divisors (see below), whose sum is σ = 257608512. Its totient is φ = 55139520.

The previous prime is 138173939. The next prime is 138173989. The reversal of 138173950 is 59371831.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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, 19827 + ... + 25873.

It is an arithmetic number, because the mean of its divisors is an integer number (10733688).

Almost surely, 2^138173950 is an apocalyptic number.

138173950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138173950 is a deficient number, since it is larger than the sum of its proper divisors (119434562).

138173950 is a wasteful number, since it uses less digits than its factorization.

138173950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6516 (or 6511 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 138173950 is about 11754.7415964793. The cubic root of 138173950 is about 516.9819627138.

The spelling of 138173950 in words is "one hundred thirty-eight million, one hundred seventy-three thousand, nine hundred fifty".