63319387 has 4 divisors (see below), whose sum is σ = 64666656. Its totient is φ = 61972120.

The previous prime is 63319363. The next prime is 63319393. The reversal of 63319387 is 78391336.

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 63319387 - 2²³ = 54930779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63319687) 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, 673564 + ... + 673657.

It is an arithmetic number, because the mean of its divisors is an integer number (16166664).

Almost surely, 2^63319387 is an apocalyptic number.

63319387 is a deficient number, since it is larger than the sum of its proper divisors (1347269).

63319387 is a wasteful number, since it uses less digits than its factorization.

63319387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1347268.

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

The square root of 63319387 is about 7957.3479878663. The cubic root of 63319387 is about 398.5769999301.

The spelling of 63319387 in words is "sixty-three million, three hundred nineteen thousand, three hundred eighty-seven".