138456573 has 16 divisors (see below), whose sum is σ = 193877376. Its totient is φ = 87721920.

The previous prime is 138456569. The next prime is 138456589. The reversal of 138456573 is 375654831.

138456573 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 138456573 - 2² = 138456569 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138456503) 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, 4443 + ... + 17223.

It is an arithmetic number, because the mean of its divisors is an integer number (12117336).

Almost surely, 2^138456573 is an apocalyptic number.

It is an amenable number.

138456573 is a deficient number, since it is larger than the sum of its proper divisors (55420803).

138456573 is a wasteful number, since it uses less digits than its factorization.

138456573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12964.

The product of its digits is 302400, while the sum is 42.

The square root of 138456573 is about 11766.7571148554. The cubic root of 138456573 is about 517.3342034632.

The spelling of 138456573 in words is "one hundred thirty-eight million, four hundred fifty-six thousand, five hundred seventy-three".