138648699 has 16 divisors (see below), whose sum is σ = 234749440. Its totient is φ = 79227720.

The previous prime is 138648667. The next prime is 138648701. The reversal of 138648699 is 996846831.

138648699 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 138648699 - 2⁵ = 138648667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138648199) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 366607 + ... + 366984.

It is an arithmetic number, because the mean of its divisors is an integer number (14671840).

Almost surely, 2^138648699 is an apocalyptic number.

138648699 is a deficient number, since it is larger than the sum of its proper divisors (96100741).

138648699 is an equidigital number, since it uses as much as digits as its factorization.

138648699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733607 (or 733601 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 54.

The square root of 138648699 is about 11774.9182162765. The cubic root of 138648699 is about 517.5733817385.

The spelling of 138648699 in words is "one hundred thirty-eight million, six hundred forty-eight thousand, six hundred ninety-nine".