138356647 has 8 divisors (see below), whose sum is σ = 162545040. Its totient is φ = 116103360.

The previous prime is 138356633. The next prime is 138356657. The reversal of 138356647 is 746653831.

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

It is a cyclic number.

It is not a de Polignac number, because 138356647 - 2²³ = 129968039 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 (138356657) 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, 483622 + ... + 483907.

It is an arithmetic number, because the mean of its divisors is an integer number (20318130).

Almost surely, 2^138356647 is an apocalyptic number.

138356647 is a deficient number, since it is larger than the sum of its proper divisors (24188393).

138356647 is a wasteful number, since it uses less digits than its factorization.

138356647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 967553.

The product of its digits is 362880, while the sum is 43.

The square root of 138356647 is about 11762.5102337894. The cubic root of 138356647 is about 517.2097177903.

The spelling of 138356647 in words is "one hundred thirty-eight million, three hundred fifty-six thousand, six hundred forty-seven".