138332164 has 6 divisors (see below), whose sum is σ = 242081294. Its totient is φ = 69166080.

The previous prime is 138332149. The next prime is 138332177. The reversal of 138332164 is 461233831.

It can be written as a sum of positive squares in only one way, i.e., 78145600 + 60186564 = 8840^2 + 7758^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17291517 + ... + 17291524.

Almost surely, 2^138332164 is an apocalyptic number.

It is an amenable number.

138332164 is a deficient number, since it is larger than the sum of its proper divisors (103749130).

138332164 is a wasteful number, since it uses less digits than its factorization.

138332164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34583045 (or 34583043 counting only the distinct ones).

The product of its digits is 10368, while the sum is 31.

The square root of 138332164 is about 11761.4694660149. The cubic root of 138332164 is about 517.1792082514.

Adding to 138332164 its reverse (461233831), we get a palindrome (599565995).

The spelling of 138332164 in words is "one hundred thirty-eight million, three hundred thirty-two thousand, one hundred sixty-four".