491094847 has 2 divisors, whose sum is σ = 491094848. Its totient is φ = 491094846.

The previous prime is 491094841. The next prime is 491094887. The reversal of 491094847 is 748490194.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 491094847 - 2⁷ = 491094719 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 491094797 and 491094806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (491094841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245547423 + 245547424.

It is an arithmetic number, because the mean of its divisors is an integer number (245547424).

Almost surely, 2^491094847 is an apocalyptic number.

491094847 is a deficient number, since it is larger than the sum of its proper divisors (1).

491094847 is an equidigital number, since it uses as much as digits as its factorization.

491094847 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 46.

The square root of 491094847 is about 22160.6598954093. The cubic root of 491094847 is about 788.9602552958.

It can be divided in two parts, 49109 and 4847, that added together give a triangular number (53956 = T₃₂₈).

The spelling of 491094847 in words is "four hundred ninety-one million, ninety-four thousand, eight hundred forty-seven".