138506996 has 12 divisors (see below), whose sum is σ = 242538660. Its totient is φ = 69210240.

The previous prime is 138506969. The next prime is 138507011. The reversal of 138506996 is 699605831.

It can be written as a sum of positive squares in 2 ways, for example, as 54967396 + 83539600 = 7414^2 + 9140^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 138506996.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2981 + ... + 16908.

It is an arithmetic number, because the mean of its divisors is an integer number (20211555).

Almost surely, 2^138506996 is an apocalyptic number.

It is an amenable number.

138506996 is a deficient number, since it is larger than the sum of its proper divisors (104031664).

138506996 is a wasteful number, since it uses less digits than its factorization.

138506996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21634 (or 21632 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 47.

The square root of 138506996 is about 11768.8995237448. The cubic root of 138506996 is about 517.3969966217.

The spelling of 138506996 in words is "one hundred thirty-eight million, five hundred six thousand, nine hundred ninety-six".