638000763 has 4 divisors (see below), whose sum is σ = 850667688. Its totient is φ = 425333840.

The previous prime is 638000747. The next prime is 638000767. The reversal of 638000763 is 367000836.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 638000763 - 2⁴ = 638000747 is a prime.

It is not an unprimeable number, because it can be changed into a prime (638000767) 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, 106333458 + ... + 106333463.

It is an arithmetic number, because the mean of its divisors is an integer number (212666922).

Almost surely, 2^638000763 is an apocalyptic number.

638000763 is a deficient number, since it is larger than the sum of its proper divisors (212666925).

638000763 is a wasteful number, since it uses less digits than its factorization.

638000763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212666924.

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 638000763 is about 25258.6769843553. The cubic root of 638000763 is about 860.8756013611.

The spelling of 638000763 in words is "six hundred thirty-eight million, seven hundred sixty-three", and thus it is an aban number.