138622647 has 8 divisors (see below), whose sum is σ = 184892400. Its totient is φ = 92384000.

The previous prime is 138622621. The next prime is 138622657. The reversal of 138622647 is 746226831.

It is a happy number.

138622647 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 138622647 - 2¹⁴ = 138606263 is a prime.

It is a super-2 number, since 2×138622647² = 38432476522573218, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138622657) 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, 6229 + ... + 17777.

It is an arithmetic number, because the mean of its divisors is an integer number (23111550).

Almost surely, 2^138622647 is an apocalyptic number.

138622647 is a deficient number, since it is larger than the sum of its proper divisors (46269753).

138622647 is a wasteful number, since it uses less digits than its factorization.

138622647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15553.

The product of its digits is 96768, while the sum is 39.

The square root of 138622647 is about 11773.8119145840. The cubic root of 138622647 is about 517.5409624744.

The spelling of 138622647 in words is "one hundred thirty-eight million, six hundred twenty-two thousand, six hundred forty-seven".