138761764 has 6 divisors (see below), whose sum is σ = 242833094. Its totient is φ = 69380880.

The previous prime is 138761759. The next prime is 138761771. The reversal of 138761764 is 467167831.

It can be written as a sum of positive squares in only one way, i.e., 88209664 + 50552100 = 9392^2 + 7110^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 138761764.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17345217 + ... + 17345224.

Almost surely, 2^138761764 is an apocalyptic number.

It is an amenable number.

138761764 is a deficient number, since it is larger than the sum of its proper divisors (104071330).

138761764 is a wasteful number, since it uses less digits than its factorization.

138761764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34690445 (or 34690443 counting only the distinct ones).

The product of its digits is 169344, while the sum is 43.

The square root of 138761764 is about 11779.7183327956. The cubic root of 138761764 is about 517.7140334597.

The spelling of 138761764 in words is "one hundred thirty-eight million, seven hundred sixty-one thousand, seven hundred sixty-four".