138258197 has 8 divisors (see below), whose sum is σ = 172373952. Its totient is φ = 107733600.

The previous prime is 138258187. The next prime is 138258223. The reversal of 138258197 is 791852831.

138258197 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 138258197 - 2⁸ = 138257941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138258187) 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, 897704 + ... + 897857.

It is an arithmetic number, because the mean of its divisors is an integer number (21546744).

Almost surely, 2^138258197 is an apocalyptic number.

It is an amenable number.

138258197 is a deficient number, since it is larger than the sum of its proper divisors (34115755).

138258197 is a wasteful number, since it uses less digits than its factorization.

138258197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1795579.

The product of its digits is 120960, while the sum is 44.

The square root of 138258197 is about 11758.3245830348. The cubic root of 138258197 is about 517.0870122558.

It can be divided in two parts, 13825 and 8197, that added together give a palindrome (22022).

The spelling of 138258197 in words is "one hundred thirty-eight million, two hundred fifty-eight thousand, one hundred ninety-seven".