138785963 has 4 divisors (see below), whose sum is σ = 139588368. Its totient is φ = 137983560.

The previous prime is 138785957. The next prime is 138785993. The reversal of 138785963 is 369587831.

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: 369587831 = 73 ⋅5062847.

It is a cyclic number.

It is not a de Polignac number, because 138785963 - 2⁴ = 138785947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138785923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 400943 + ... + 401288.

It is an arithmetic number, because the mean of its divisors is an integer number (34897092).

Almost surely, 2^138785963 is an apocalyptic number.

138785963 is a deficient number, since it is larger than the sum of its proper divisors (802405).

138785963 is an equidigital number, since it uses as much as digits as its factorization.

138785963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802404.

The product of its digits is 1088640, while the sum is 50.

The square root of 138785963 is about 11780.7454348186. The cubic root of 138785963 is about 517.7441268450.

The spelling of 138785963 in words is "one hundred thirty-eight million, seven hundred eighty-five thousand, nine hundred sixty-three".