138389197 has 16 divisors (see below), whose sum is σ = 150370560. Its totient is φ = 126862848.

The previous prime is 138389159. The next prime is 138389219. The reversal of 138389197 is 791983831.

It is a cyclic number.

It is not a de Polignac number, because 138389197 - 2²³ = 130000589 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 138389197.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138389107) 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, 302593 + ... + 303049.

It is an arithmetic number, because the mean of its divisors is an integer number (9398160).

Almost surely, 2^138389197 is an apocalyptic number.

138389197 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

138389197 is a deficient number, since it is larger than the sum of its proper divisors (11981363).

138389197 is a wasteful number, since it uses less digits than its factorization.

138389197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900.

The product of its digits is 326592, while the sum is 49.

The square root of 138389197 is about 11763.8937856477. The cubic root of 138389197 is about 517.2502744643.

The spelling of 138389197 in words is "one hundred thirty-eight million, three hundred eighty-nine thousand, one hundred ninety-seven".