138544346 has 4 divisors (see below), whose sum is σ = 207816522. Its totient is φ = 69272172.

The previous prime is 138544309. The next prime is 138544361. The reversal of 138544346 is 643445831.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 643445831 = 7 ⋅91920833.

It can be written as a sum of positive squares in only one way, i.e., 92833225 + 45711121 = 9635^2 + 6761^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34636085 + ... + 34636088.

Almost surely, 2^138544346 is an apocalyptic number.

138544346 is a deficient number, since it is larger than the sum of its proper divisors (69272176).

138544346 is an equidigital number, since it uses as much as digits as its factorization.

138544346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69272175.

The product of its digits is 138240, while the sum is 38.

The square root of 138544346 is about 11770.4862261506. The cubic root of 138544346 is about 517.4434997866.

The spelling of 138544346 in words is "one hundred thirty-eight million, five hundred forty-four thousand, three hundred forty-six".