138174287 has 4 divisors (see below), whose sum is σ = 139054536. Its totient is φ = 137294040.

The previous prime is 138174263. The next prime is 138174319. The reversal of 138174287 is 782471831.

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

It is a cyclic number.

It is not a de Polignac number, because 138174287 - 2¹² = 138170191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138174247) 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, 439889 + ... + 440202.

It is an arithmetic number, because the mean of its divisors is an integer number (34763634).

Almost surely, 2^138174287 is an apocalyptic number.

138174287 is a deficient number, since it is larger than the sum of its proper divisors (880249).

138174287 is an equidigital number, since it uses as much as digits as its factorization.

138174287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880248.

The product of its digits is 75264, while the sum is 41.

The square root of 138174287 is about 11754.7559311115. The cubic root of 138174287 is about 516.9823830119.

The spelling of 138174287 in words is "one hundred thirty-eight million, one hundred seventy-four thousand, two hundred eighty-seven".