138568197 has 16 divisors (see below), whose sum is σ = 195168960. Its totient is φ = 87207552.

The previous prime is 138568189. The next prime is 138568201. The reversal of 138568197 is 791865831.

It is not a de Polignac number, because 138568197 - 2³ = 138568189 is a prime.

It is a super-2 number, since 2×138568197² = 38402290439661618, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138568117) 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, 12553 + ... + 20849.

It is an arithmetic number, because the mean of its divisors is an integer number (12198060).

Almost surely, 2^138568197 is an apocalyptic number.

It is an amenable number.

138568197 is a deficient number, since it is larger than the sum of its proper divisors (56600763).

138568197 is a wasteful number, since it uses less digits than its factorization.

138568197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8612.

The product of its digits is 362880, while the sum is 48.

The square root of 138568197 is about 11771.4993522491. The cubic root of 138568197 is about 517.4731914512.

The spelling of 138568197 in words is "one hundred thirty-eight million, five hundred sixty-eight thousand, one hundred ninety-seven".