491094887 has 2 divisors, whose sum is σ = 491094888. Its totient is φ = 491094886.

The previous prime is 491094847. The next prime is 491094893. The reversal of 491094887 is 788490194.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 491094887 - 2⁸ = 491094631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (491094817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245547443 + 245547444.

It is an arithmetic number, because the mean of its divisors is an integer number (245547444).

Almost surely, 2^491094887 is an apocalyptic number.

491094887 is a deficient number, since it is larger than the sum of its proper divisors (1).

491094887 is an equidigital number, since it uses as much as digits as its factorization.

491094887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 580608, while the sum is 50.

The square root of 491094887 is about 22160.6607979094. The cubic root of 491094887 is about 788.9602767163.

The spelling of 491094887 in words is "four hundred ninety-one million, ninety-four thousand, eight hundred eighty-seven".