138597466 has 32 divisors (see below), whose sum is σ = 251274240. Its totient is φ = 56073600.

The previous prime is 138597463. The next prime is 138597469. The reversal of 138597466 is 664795831.

It is an interprime number because it is at equal distance from previous prime (138597463) and next prime (138597469).

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (138597463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13900 + ... + 21688.

It is an arithmetic number, because the mean of its divisors is an integer number (7852320).

Almost surely, 2^138597466 is an apocalyptic number.

138597466 is a deficient number, since it is larger than the sum of its proper divisors (112676774).

138597466 is a wasteful number, since it uses less digits than its factorization.

138597466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7870.

The product of its digits is 1088640, while the sum is 49.

The square root of 138597466 is about 11772.7425012187. The cubic root of 138597466 is about 517.5096232273.

The spelling of 138597466 in words is "one hundred thirty-eight million, five hundred ninety-seven thousand, four hundred sixty-six".