138121414 has 8 divisors (see below), whose sum is σ = 209510280. Its totient is φ = 68284656.

The previous prime is 138121411. The next prime is 138121427. The reversal of 138121414 is 414121831.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138121411) 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, 387804 + ... + 388159.

It is an arithmetic number, because the mean of its divisors is an integer number (26188785).

Almost surely, 2^138121414 is an apocalyptic number.

138121414 is a deficient number, since it is larger than the sum of its proper divisors (71388866).

138121414 is an equidigital number, since it uses as much as digits as its factorization.

138121414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776054.

The product of its digits is 768, while the sum is 25.

The square root of 138121414 is about 11752.5067113361. The cubic root of 138121414 is about 516.9164327366.

The spelling of 138121414 in words is "one hundred thirty-eight million, one hundred twenty-one thousand, four hundred fourteen".