138434517 has 12 divisors (see below), whose sum is σ = 215342764. Its totient is φ = 85190400.

The previous prime is 138434509. The next prime is 138434533. The reversal of 138434517 is 715434831.

It is a happy number.

138434517 is a `hidden beast` number, since 138 + 4 + 3 + 4 + 517 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 12680721 + 125753796 = 3561^2 + 11214^2 .

It is not a de Polignac number, because 138434517 - 2³ = 138434509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138434507) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 591484 + ... + 591717.

Almost surely, 2^138434517 is an apocalyptic number.

It is an amenable number.

138434517 is a deficient number, since it is larger than the sum of its proper divisors (76908247).

138434517 is a wasteful number, since it uses less digits than its factorization.

138434517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1183220 (or 1183217 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 138434517 is about 11765.8198609362. The cubic root of 138434517 is about 517.3067317227.

The spelling of 138434517 in words is "one hundred thirty-eight million, four hundred thirty-four thousand, five hundred seventeen".