138653967 has 8 divisors (see below), whose sum is σ = 185840640. Its totient is φ = 91951640.

The previous prime is 138653947. The next prime is 138653969. The reversal of 138653967 is 769356831.

It is a happy number.

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 138653967 - 2⁶ = 138653903 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138653969) 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, 120417 + ... + 121562.

It is an arithmetic number, because the mean of its divisors is an integer number (23230080).

Almost surely, 2^138653967 is an apocalyptic number.

138653967 is a deficient number, since it is larger than the sum of its proper divisors (47186673).

138653967 is a wasteful number, since it uses less digits than its factorization.

138653967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242173.

The product of its digits is 816480, while the sum is 48.

The square root of 138653967 is about 11775.1419099729. The cubic root of 138653967 is about 517.5799367754.

The spelling of 138653967 in words is "one hundred thirty-eight million, six hundred fifty-three thousand, nine hundred sixty-seven".