138008699 has 4 divisors (see below), whose sum is σ = 138771360. Its totient is φ = 137246040.

The previous prime is 138008693. The next prime is 138008719. The reversal of 138008699 is 996800831.

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 138008699 - 2⁸ = 138008443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138008693) 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, 381059 + ... + 381420.

It is an arithmetic number, because the mean of its divisors is an integer number (34692840).

Almost surely, 2^138008699 is an apocalyptic number.

138008699 is a deficient number, since it is larger than the sum of its proper divisors (762661).

138008699 is an equidigital number, since it uses as much as digits as its factorization.

138008699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 762660.

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 138008699 is about 11747.7103726641. The cubic root of 138008699 is about 516.7757833128.

The spelling of 138008699 in words is "one hundred thirty-eight million, eight thousand, six hundred ninety-nine".