138602053 has 4 divisors (see below), whose sum is σ = 139947808. Its totient is φ = 137256300.

The previous prime is 138602047. The next prime is 138602069. The reversal of 138602053 is 350206831.

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 a de Polignac number, because none of the positive numbers 2^k-138602053 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 (138602353) 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, 672723 + ... + 672928.

It is an arithmetic number, because the mean of its divisors is an integer number (34986952).

Almost surely, 2^138602053 is an apocalyptic number.

It is an amenable number.

138602053 is a deficient number, since it is larger than the sum of its proper divisors (1345755).

138602053 is a wasteful number, since it uses less digits than its factorization.

138602053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1345754.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 138602053 is about 11772.9373140266. The cubic root of 138602053 is about 517.5153323034.

Adding to 138602053 its reverse (350206831), we get a palindrome (488808884).

The spelling of 138602053 in words is "one hundred thirty-eight million, six hundred two thousand, fifty-three".