506947979 has 2 divisors, whose sum is σ = 506947980. Its totient is φ = 506947978.

The previous prime is 506947951. The next prime is 506947999. The reversal of 506947979 is 979749605.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 506947979 - 2⁸ = 506947723 is a prime.

It is not a weakly prime, because it can be changed into another prime (506947999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 253473989 + 253473990.

It is an arithmetic number, because the mean of its divisors is an integer number (253473990).

Almost surely, 2^506947979 is an apocalyptic number.

506947979 is a deficient number, since it is larger than the sum of its proper divisors (1).

506947979 is an equidigital number, since it uses as much as digits as its factorization.

506947979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4286520, while the sum is 56.

The square root of 506947979 is about 22515.5053019025. The cubic root of 506947979 is about 797.3600368888.

The spelling of 506947979 in words is "five hundred six million, nine hundred forty-seven thousand, nine hundred seventy-nine".