491382079 has 2 divisors, whose sum is σ = 491382080. Its totient is φ = 491382078.

The previous prime is 491382049. The next prime is 491382103. The reversal of 491382079 is 970283194.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 491382079 - 2⁹ = 491381567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (491382019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245691039 + 245691040.

It is an arithmetic number, because the mean of its divisors is an integer number (245691040).

Almost surely, 2^491382079 is an apocalyptic number.

491382079 is a deficient number, since it is larger than the sum of its proper divisors (1).

491382079 is an equidigital number, since it uses as much as digits as its factorization.

491382079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 491382079 is about 22167.1396215209. The cubic root of 491382079 is about 789.1140412477.

The spelling of 491382079 in words is "four hundred ninety-one million, three hundred eighty-two thousand, seventy-nine".