138912914 has 16 divisors (see below), whose sum is σ = 250670400. Its totient is φ = 56400624.

The previous prime is 138912901. The next prime is 138912937. The reversal of 138912914 is 419219831.

It is a Harshad number since it is a multiple of its sum of digits (38).

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 7 ways as a sum of consecutive naturals, for example, 260849 + ... + 261380.

It is an arithmetic number, because the mean of its divisors is an integer number (15666900).

Almost surely, 2^138912914 is an apocalyptic number.

138912914 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

138912914 is a deficient number, since it is larger than the sum of its proper divisors (111757486).

138912914 is a wasteful number, since it uses less digits than its factorization.

138912914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522257.

The product of its digits is 15552, while the sum is 38.

The square root of 138912914 is about 11786.1322748389. The cubic root of 138912914 is about 517.9019432465.

The spelling of 138912914 in words is "one hundred thirty-eight million, nine hundred twelve thousand, nine hundred fourteen".