138513736 has 8 divisors (see below), whose sum is σ = 259713270. Its totient is φ = 69256864.

The previous prime is 138513733. The next prime is 138513761. The reversal of 138513736 is 637315831.

138513736 = T₉₆₀₈ + T₉₆₀₉ + T₉₆₁₀.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 90820900 + 47692836 = 9530^2 + 6906^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 138513695 and 138513704.

It is not an unprimeable number, because it can be changed into a prime (138513731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8657101 + ... + 8657116.

Almost surely, 2^138513736 is an apocalyptic number.

138513736 is the 9610-th centered triangular number.

It is an amenable number.

138513736 is a deficient number, since it is larger than the sum of its proper divisors (121199534).

138513736 is a wasteful number, since it uses less digits than its factorization.

138513736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17314223 (or 17314219 counting only the distinct ones).

The product of its digits is 45360, while the sum is 37.

The square root of 138513736 is about 11769.1858681899. The cubic root of 138513736 is about 517.4053889756.

The spelling of 138513736 in words is "one hundred thirty-eight million, five hundred thirteen thousand, seven hundred thirty-six".