138871699 has 16 divisors (see below), whose sum is σ = 145410048. Its totient is φ = 132532992.

The previous prime is 138871679. The next prime is 138871717. The reversal of 138871699 is 996178831.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 138871699 - 2¹³ = 138863507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138871609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 378214 + ... + 378580.

It is an arithmetic number, because the mean of its divisors is an integer number (9088128).

Almost surely, 2^138871699 is an apocalyptic number.

138871699 is a deficient number, since it is larger than the sum of its proper divisors (6538349).

138871699 is an equidigital number, since it uses as much as digits as its factorization.

138871699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594.

The product of its digits is 653184, while the sum is 52.

The square root of 138871699 is about 11784.3836919883. The cubic root of 138871699 is about 517.8507182515.

The spelling of 138871699 in words is "one hundred thirty-eight million, eight hundred seventy-one thousand, six hundred ninety-nine".