138203164 has 12 divisors (see below), whose sum is σ = 263842488. Its totient is φ = 62819600.

The previous prime is 138203147. The next prime is 138203179. The reversal of 138203164 is 461302831.

It is a super-2 number, since 2×138203164² = 38200229079221792, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 1570447 + ... + 1570534.

It is an arithmetic number, because the mean of its divisors is an integer number (21986874).

Almost surely, 2^138203164 is an apocalyptic number.

It is an amenable number.

138203164 is a deficient number, since it is larger than the sum of its proper divisors (125639324).

138203164 is a wasteful number, since it uses less digits than its factorization.

138203164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3140996 (or 3140994 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 138203164 is about 11755.9841782813. The cubic root of 138203164 is about 517.0183951642.

Adding to 138203164 its reverse (461302831), we get a palindrome (599505995).

It can be divided in two parts, 138 and 203164, that added together give a palindrome (203302).

The spelling of 138203164 in words is "one hundred thirty-eight million, two hundred three thousand, one hundred sixty-four".