501338387 has 8 divisors (see below), whose sum is σ = 548541552. Its totient is φ = 454406400.

The previous prime is 501338359. The next prime is 501338393. The reversal of 501338387 is 783833105.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 501338387 - 2⁶ = 501338323 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 501338387.

It is not an unprimeable number, because it can be changed into a prime (501338317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63914 + ... + 71327.

It is an arithmetic number, because the mean of its divisors is an integer number (68567694).

Almost surely, 2^501338387 is an apocalyptic number.

501338387 is a deficient number, since it is larger than the sum of its proper divisors (47203165).

501338387 is a wasteful number, since it uses less digits than its factorization.

501338387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135589.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 501338387 is about 22390.5870177626. The cubic root of 501338387 is about 794.4080806817.

The spelling of 501338387 in words is "five hundred one million, three hundred thirty-eight thousand, three hundred eighty-seven".