501078989 has 8 divisors (see below), whose sum is σ = 528742080. Its totient is φ = 473905696.

The previous prime is 501078979. The next prime is 501079003. The reversal of 501078989 is 989870105.

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 501078989 - 2⁴ = 501078973 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501078979) 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, 120347 + ... + 124440.

It is an arithmetic number, because the mean of its divisors is an integer number (66092760).

Almost surely, 2^501078989 is an apocalyptic number.

It is an amenable number.

501078989 is a deficient number, since it is larger than the sum of its proper divisors (27663091).

501078989 is a wasteful number, since it uses less digits than its factorization.

501078989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244899.

The product of its (nonzero) digits is 181440, while the sum is 47.

The square root of 501078989 is about 22384.7937001885. The cubic root of 501078989 is about 794.2710452159.

The spelling of 501078989 in words is "five hundred one million, seventy-eight thousand, nine hundred eighty-nine".