138684297 has 16 divisors (see below), whose sum is σ = 192642560. Its totient is φ = 88646400.

The previous prime is 138684281. The next prime is 138684311. The reversal of 138684297 is 792486831.

It is not a de Polignac number, because 138684297 - 2⁴ = 138684281 is a prime.

It is a Duffinian number.

Its product of digits (580608) is a multiple of the sum of its prime divisors (13824).

It is not an unprimeable number, because it can be changed into a prime (138684197) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3297 + ... + 16977.

It is an arithmetic number, because the mean of its divisors is an integer number (12040160).

Almost surely, 2^138684297 is an apocalyptic number.

It is an amenable number.

138684297 is a deficient number, since it is larger than the sum of its proper divisors (53958263).

138684297 is a wasteful number, since it uses less digits than its factorization.

138684297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13824.

The product of its digits is 580608, while the sum is 48.

The square root of 138684297 is about 11776.4297221187. The cubic root of 138684297 is about 517.6176735368.

The spelling of 138684297 in words is "one hundred thirty-eight million, six hundred eighty-four thousand, two hundred ninety-seven".