138367787 has 8 divisors (see below), whose sum is σ = 147757440. Its totient is φ = 129286080.

The previous prime is 138367781. The next prime is 138367829. The reversal of 138367787 is 787763831.

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

It is a cyclic number.

It is not a de Polignac number, because 138367787 - 2¹⁴ = 138351403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138367781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76058 + ... + 77855.

It is an arithmetic number, because the mean of its divisors is an integer number (18469680).

Almost surely, 2^138367787 is an apocalyptic number.

138367787 is a deficient number, since it is larger than the sum of its proper divisors (9389653).

138367787 is a wasteful number, since it uses less digits than its factorization.

138367787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153973.

The product of its digits is 1185408, while the sum is 50.

The square root of 138367787 is about 11762.9837626344. The cubic root of 138367787 is about 517.2235987320.

The spelling of 138367787 in words is "one hundred thirty-eight million, three hundred sixty-seven thousand, seven hundred eighty-seven".