138084427 has 4 divisors (see below), whose sum is σ = 148706320. Its totient is φ = 127462536.

The previous prime is 138084413. The next prime is 138084431. The reversal of 138084427 is 724480831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138084427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138084437) 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, 5310927 + ... + 5310952.

It is an arithmetic number, because the mean of its divisors is an integer number (37176580).

Almost surely, 2^138084427 is an apocalyptic number.

138084427 is a deficient number, since it is larger than the sum of its proper divisors (10621893).

138084427 is a wasteful number, since it uses less digits than its factorization.

138084427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10621892.

The product of its (nonzero) digits is 43008, while the sum is 37.

The square root of 138084427 is about 11750.9330267856. The cubic root of 138084427 is about 516.8702875990.

The spelling of 138084427 in words is "one hundred thirty-eight million, eighty-four thousand, four hundred twenty-seven".