138459847 has 4 divisors (see below), whose sum is σ = 138489480. Its totient is φ = 138430216.

The previous prime is 138459823. The next prime is 138459851. The reversal of 138459847 is 748954831.

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 138459847 - 2⁷ = 138459719 is a prime.

It is a super-2 number, since 2×138459847² = 38342258462526818, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 138459847.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138459877) 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, 6097 + ... + 17722.

It is an arithmetic number, because the mean of its divisors is an integer number (34622370).

Almost surely, 2^138459847 is an apocalyptic number.

138459847 is a deficient number, since it is larger than the sum of its proper divisors (29633).

138459847 is an equidigital number, since it uses as much as digits as its factorization.

138459847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29632.

The product of its digits is 967680, while the sum is 49.

The square root of 138459847 is about 11766.8962347766. The cubic root of 138459847 is about 517.3382811289.

The spelling of 138459847 in words is "one hundred thirty-eight million, four hundred fifty-nine thousand, eight hundred forty-seven".