138788267 has 4 divisors (see below), whose sum is σ = 139881216. Its totient is φ = 137695320.

The previous prime is 138788231. The next prime is 138788281. The reversal of 138788267 is 762887831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 762887831 = 97 ⋅7864823.

It is a cyclic number.

It is not a de Polignac number, because 138788267 - 2⁶ = 138788203 is a prime.

It is a super-4 number, since 4×138788267⁴ (a number of 34 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138788467) 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, 546284 + ... + 546537.

It is an arithmetic number, because the mean of its divisors is an integer number (34970304).

Almost surely, 2^138788267 is an apocalyptic number.

138788267 is a deficient number, since it is larger than the sum of its proper divisors (1092949).

138788267 is a wasteful number, since it uses less digits than its factorization.

138788267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1092948.

The product of its digits is 903168, while the sum is 50.

The square root of 138788267 is about 11780.8432210942. The cubic root of 138788267 is about 517.7469918703.

The spelling of 138788267 in words is "one hundred thirty-eight million, seven hundred eighty-eight thousand, two hundred sixty-seven".