38139763 has 4 divisors (see below), whose sum is σ = 38161728. Its totient is φ = 38117800.

The previous prime is 38139757. The next prime is 38139769. The reversal of 38139763 is 36793183.

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

It is an interprime number because it is at equal distance from previous prime (38139757) and next prime (38139769).

It is a cyclic number.

It is not a de Polignac number, because 38139763 - 2²⁵ = 4585331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38139769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8131 + ... + 11932.

It is an arithmetic number, because the mean of its divisors is an integer number (9540432).

Almost surely, 2^38139763 is an apocalyptic number.

38139763 is a deficient number, since it is larger than the sum of its proper divisors (21965).

38139763 is a wasteful number, since it uses less digits than its factorization.

38139763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21964.

The product of its digits is 81648, while the sum is 40.

The square root of 38139763 is about 6175.7398747033. The cubic root of 38139763 is about 336.6092116225.

The spelling of 38139763 in words is "thirty-eight million, one hundred thirty-nine thousand, seven hundred sixty-three".