138288851 has 4 divisors (see below), whose sum is σ = 138313032. Its totient is φ = 138264672.

The previous prime is 138288847. The next prime is 138288853. The reversal of 138288851 is 158882831.

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 138288851 - 2² = 138288847 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138288853) 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, 1835 + ... + 16731.

It is an arithmetic number, because the mean of its divisors is an integer number (34578258).

Almost surely, 2^138288851 is an apocalyptic number.

138288851 is a deficient number, since it is larger than the sum of its proper divisors (24181).

138288851 is an equidigital number, since it uses as much as digits as its factorization.

138288851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24180.

The product of its digits is 122880, while the sum is 44.

The square root of 138288851 is about 11759.6280128242. The cubic root of 138288851 is about 517.1252248520.

The spelling of 138288851 in words is "one hundred thirty-eight million, two hundred eighty-eight thousand, eight hundred fifty-one".