138429602 has 4 divisors (see below), whose sum is σ = 207644406. Its totient is φ = 69214800.

The previous prime is 138429593. The next prime is 138429637. The reversal of 138429602 is 206924831.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 125462401 + 12967201 = 11201^2 + 3601^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34607399 + ... + 34607402.

Almost surely, 2^138429602 is an apocalyptic number.

138429602 is a deficient number, since it is larger than the sum of its proper divisors (69214804).

138429602 is an equidigital number, since it uses as much as digits as its factorization.

138429602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69214803.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 138429602 is about 11765.6109913595. The cubic root of 138429602 is about 517.3006094715.

The spelling of 138429602 in words is "one hundred thirty-eight million, four hundred twenty-nine thousand, six hundred two".