501147979 has 2 divisors, whose sum is σ = 501147980. Its totient is φ = 501147978.

The previous prime is 501147937. The next prime is 501148013. The reversal of 501147979 is 979741105.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 501147979 - 2²⁵ = 467593547 is a prime.

It is a super-2 number, since 2×501147979² = 502298593711568882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (501147079) 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 as a sum of consecutive naturals, namely, 250573989 + 250573990.

It is an arithmetic number, because the mean of its divisors is an integer number (250573990).

Almost surely, 2^501147979 is an apocalyptic number.

501147979 is a deficient number, since it is larger than the sum of its proper divisors (1).

501147979 is an equidigital number, since it uses as much as digits as its factorization.

501147979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 79380, while the sum is 43.

The square root of 501147979 is about 22386.3346486199. The cubic root of 501147979 is about 794.3074960523.

The spelling of 501147979 in words is "five hundred one million, one hundred forty-seven thousand, nine hundred seventy-nine".