138868763 has 16 divisors (see below), whose sum is σ = 155796480. Its totient is φ = 122683200.

The previous prime is 138868759. The next prime is 138868771. The reversal of 138868763 is 367868831.

It is a cyclic number.

It is not a de Polignac number, because 138868763 - 2² = 138868759 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138868753) 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 15 ways as a sum of consecutive naturals, for example, 165098 + ... + 165936.

It is an arithmetic number, because the mean of its divisors is an integer number (9737280).

Almost surely, 2^138868763 is an apocalyptic number.

138868763 is a deficient number, since it is larger than the sum of its proper divisors (16927717).

138868763 is a wasteful number, since it uses less digits than its factorization.

138868763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1258.

The product of its digits is 1161216, while the sum is 50.

The square root of 138868763 is about 11784.2591196901. The cubic root of 138868763 is about 517.8470687908.

The spelling of 138868763 in words is "one hundred thirty-eight million, eight hundred sixty-eight thousand, seven hundred sixty-three".