138687801 has 8 divisors (see below), whose sum is σ = 211333824. Its totient is φ = 79250160.

The previous prime is 138687799. The next prime is 138687833. The reversal of 138687801 is 108786831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 138687801 - 2¹ = 138687799 is a prime.

It is a super-2 number, since 2×138687801² = 38468612292431202, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (138687851) 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 7 ways as a sum of consecutive naturals, for example, 3302070 + ... + 3302111.

It is an arithmetic number, because the mean of its divisors is an integer number (26416728).

Almost surely, 2^138687801 is an apocalyptic number.

It is an amenable number.

138687801 is a deficient number, since it is larger than the sum of its proper divisors (72646023).

138687801 is an equidigital number, since it uses as much as digits as its factorization.

138687801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6604191.

The product of its (nonzero) digits is 64512, while the sum is 42.

The square root of 138687801 is about 11776.5784929240. The cubic root of 138687801 is about 517.6220328793.

The spelling of 138687801 in words is "one hundred thirty-eight million, six hundred eighty-seven thousand, eight hundred one".