491358941 has 2 divisors, whose sum is σ = 491358942. Its totient is φ = 491358940.

The previous prime is 491358937. The next prime is 491358947. The reversal of 491358941 is 149853194.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 442218841 + 49140100 = 21029^2 + 7010^2 .

It is a cyclic number.

It is not a de Polignac number, because 491358941 - 2² = 491358937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 491358892 and 491358901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (491358947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245679470 + 245679471.

It is an arithmetic number, because the mean of its divisors is an integer number (245679471).

Almost surely, 2^491358941 is an apocalyptic number.

It is an amenable number.

491358941 is a deficient number, since it is larger than the sum of its proper divisors (1).

491358941 is an equidigital number, since it uses as much as digits as its factorization.

491358941 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 44.

The square root of 491358941 is about 22166.6177167379. The cubic root of 491358941 is about 789.1016552260.

The spelling of 491358941 in words is "four hundred ninety-one million, three hundred fifty-eight thousand, nine hundred forty-one".