491290627 has 2 divisors, whose sum is σ = 491290628. Its totient is φ = 491290626.

The previous prime is 491290601. The next prime is 491290637. The reversal of 491290627 is 726092194.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-491290627 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 491290627.

It is not a weakly prime, because it can be changed into another prime (491290637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245645313 + 245645314.

It is an arithmetic number, because the mean of its divisors is an integer number (245645314).

Almost surely, 2^491290627 is an apocalyptic number.

491290627 is a deficient number, since it is larger than the sum of its proper divisors (1).

491290627 is an equidigital number, since it uses as much as digits as its factorization.

491290627 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 491290627 is about 22165.0767424794. The cubic root of 491290627 is about 789.0650837339.

The spelling of 491290627 in words is "four hundred ninety-one million, two hundred ninety thousand, six hundred twenty-seven".