138070099 has 4 divisors (see below), whose sum is σ = 138301200. Its totient is φ = 137839000.

The previous prime is 138070087. The next prime is 138070103. The reversal of 138070099 is 990070831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138070099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138070019) 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, 114652 + ... + 115849.

It is an arithmetic number, because the mean of its divisors is an integer number (34575300).

Almost surely, 2^138070099 is an apocalyptic number.

138070099 is a deficient number, since it is larger than the sum of its proper divisors (231101).

138070099 is an equidigital number, since it uses as much as digits as its factorization.

138070099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231100.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 138070099 is about 11750.3233572528. The cubic root of 138070099 is about 516.8524097113.

The spelling of 138070099 in words is "one hundred thirty-eight million, seventy thousand, ninety-nine".