491877079 has 2 divisors, whose sum is σ = 491877080. Its totient is φ = 491877078.

The previous prime is 491877059. The next prime is 491877107. The reversal of 491877079 is 970778194.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 491877079 - 2⁷ = 491876951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (491877019) 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, 245938539 + 245938540.

It is an arithmetic number, because the mean of its divisors is an integer number (245938540).

Almost surely, 2^491877079 is an apocalyptic number.

491877079 is a deficient number, since it is larger than the sum of its proper divisors (1).

491877079 is an equidigital number, since it uses as much as digits as its factorization.

491877079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 889056, while the sum is 52.

The square root of 491877079 is about 22178.3019864010. The cubic root of 491877079 is about 789.3789270179.

The spelling of 491877079 in words is "four hundred ninety-one million, eight hundred seventy-seven thousand, seventy-nine".