138353386 has 4 divisors (see below), whose sum is σ = 207530082. Its totient is φ = 69176692.

The previous prime is 138353377. The next prime is 138353387. The reversal of 138353386 is 683353831.

It is a happy number.

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., 136305625 + 2047761 = 11675^2 + 1431^2 .

It is not an unprimeable number, because it can be changed into a prime (138353387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34588345 + ... + 34588348.

Almost surely, 2^138353386 is an apocalyptic number.

138353386 is a deficient number, since it is larger than the sum of its proper divisors (69176696).

138353386 is an equidigital number, since it uses as much as digits as its factorization.

138353386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69176695.

The product of its digits is 155520, while the sum is 40.

The square root of 138353386 is about 11762.3716146022. The cubic root of 138353386 is about 517.2056542965.

The spelling of 138353386 in words is "one hundred thirty-eight million, three hundred fifty-three thousand, three hundred eighty-six".