501978963 has 8 divisors (see below), whose sum is σ = 687394768. Its totient is φ = 325607904.

The previous prime is 501978959. The next prime is 501979003. The reversal of 501978963 is 369879105.

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

It is not a de Polignac number, because 501978963 - 2² = 501978959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (501978923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2261056 + ... + 2261277.

It is an arithmetic number, because the mean of its divisors is an integer number (85924346).

Almost surely, 2^501978963 is an apocalyptic number.

501978963 is a deficient number, since it is larger than the sum of its proper divisors (185415805).

501978963 is a wasteful number, since it uses less digits than its factorization.

501978963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4522373.

The product of its (nonzero) digits is 408240, while the sum is 48.

The square root of 501978963 is about 22404.8870338594. The cubic root of 501978963 is about 794.7462835009.

The spelling of 501978963 in words is "five hundred one million, nine hundred seventy-eight thousand, nine hundred sixty-three".