138750887 has 4 divisors (see below), whose sum is σ = 151364616. Its totient is φ = 126137160.

The previous prime is 138750869. The next prime is 138750893. The reversal of 138750887 is 788057831.

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 138750887 - 2⁸ = 138750631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138750817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6306848 + ... + 6306869.

It is an arithmetic number, because the mean of its divisors is an integer number (37841154).

Almost surely, 2^138750887 is an apocalyptic number.

138750887 is a deficient number, since it is larger than the sum of its proper divisors (12613729).

138750887 is a wasteful number, since it uses less digits than its factorization.

138750887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12613728.

The product of its (nonzero) digits is 376320, while the sum is 47.

The square root of 138750887 is about 11779.2566403827. The cubic root of 138750887 is about 517.7005059035.

The spelling of 138750887 in words is "one hundred thirty-eight million, seven hundred fifty thousand, eight hundred eighty-seven".