138773601 has 32 divisors (see below), whose sum is σ = 218488320. Its totient is φ = 86752512.

The previous prime is 138773581. The next prime is 138773611. The reversal of 138773601 is 106377831.

It is not a de Polignac number, because 138773601 - 2¹⁹ = 138249313 is a prime.

It is a super-2 number, since 2×138773601² = 38516224669014402, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (138773611) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 212191 + ... + 212843.

It is an arithmetic number, because the mean of its divisors is an integer number (6827760).

Almost surely, 2^138773601 is an apocalyptic number.

It is an amenable number.

138773601 is a deficient number, since it is larger than the sum of its proper divisors (79714719).

138773601 is a wasteful number, since it uses less digits than its factorization.

138773601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1142 (or 1136 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 138773601 is about 11780.2207534494. The cubic root of 138773601 is about 517.7287541498.

The spelling of 138773601 in words is "one hundred thirty-eight million, seven hundred seventy-three thousand, six hundred one".