138710427 has 8 divisors (see below), whose sum is σ = 185003520. Its totient is φ = 92445480.

The previous prime is 138710423. The next prime is 138710437. The reversal of 138710427 is 724017831.

It is a happy number.

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

It is not a de Polignac number, because 138710427 - 2² = 138710423 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138710423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11274 + ... + 20112.

It is an arithmetic number, because the mean of its divisors is an integer number (23125440).

Almost surely, 2^138710427 is an apocalyptic number.

138710427 is a deficient number, since it is larger than the sum of its proper divisors (46293093).

138710427 is an equidigital number, since it uses as much as digits as its factorization.

138710427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14073.

The product of its (nonzero) digits is 9408, while the sum is 33.

The square root of 138710427 is about 11777.5390893004. The cubic root of 138710427 is about 517.6501802222.

The spelling of 138710427 in words is "one hundred thirty-eight million, seven hundred ten thousand, four hundred twenty-seven".