138371767 has 4 divisors (see below), whose sum is σ = 138397480. Its totient is φ = 138346056.

The previous prime is 138371759. The next prime is 138371791. The reversal of 138371767 is 767173831.

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 138371767 - 2³ = 138371759 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 (138374767) 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, 1353 + ... + 16690.

It is an arithmetic number, because the mean of its divisors is an integer number (34599370).

Almost surely, 2^138371767 is an apocalyptic number.

138371767 is a deficient number, since it is larger than the sum of its proper divisors (25713).

138371767 is an equidigital number, since it uses as much as digits as its factorization.

138371767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25712.

The product of its digits is 148176, while the sum is 43.

The square root of 138371767 is about 11763.1529361817. The cubic root of 138371767 is about 517.2285578106.

The spelling of 138371767 in words is "one hundred thirty-eight million, three hundred seventy-one thousand, seven hundred sixty-seven".