138283557 has 4 divisors (see below), whose sum is σ = 184378080. Its totient is φ = 92189036.

The previous prime is 138283549. The next prime is 138283573. The reversal of 138283557 is 755382831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 138283557 - 2³ = 138283549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138283507) 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 3 ways as a sum of consecutive naturals, for example, 23047257 + ... + 23047262.

It is an arithmetic number, because the mean of its divisors is an integer number (46094520).

Almost surely, 2^138283557 is an apocalyptic number.

It is an amenable number.

138283557 is a deficient number, since it is larger than the sum of its proper divisors (46094523).

138283557 is an equidigital number, since it uses as much as digits as its factorization.

138283557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46094522.

The product of its digits is 201600, while the sum is 42.

The square root of 138283557 is about 11759.4029185159. The cubic root of 138283557 is about 517.1186258725.

The spelling of 138283557 in words is "one hundred thirty-eight million, two hundred eighty-three thousand, five hundred fifty-seven".