491948293 has 2 divisors, whose sum is σ = 491948294. Its totient is φ = 491948292.

The previous prime is 491948273. The next prime is 491948297. The reversal of 491948293 is 392849194.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 269550724 + 222397569 = 16418^2 + 14913^2 .

It is a cyclic number.

It is not a de Polignac number, because 491948293 - 2²⁵ = 458393861 is a prime.

It is a super-2 number, since 2×491948293² = 484026245971227698, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (491948297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245974146 + 245974147.

It is an arithmetic number, because the mean of its divisors is an integer number (245974147).

Almost surely, 2^491948293 is an apocalyptic number.

It is an amenable number.

491948293 is a deficient number, since it is larger than the sum of its proper divisors (1).

491948293 is an equidigital number, since it uses as much as digits as its factorization.

491948293 is an evil number, because the sum of its binary digits is even.

The product of its digits is 559872, while the sum is 49.

The square root of 491948293 is about 22179.9074163983. The cubic root of 491948293 is about 789.4170206261.

Subtracting from 491948293 its reverse (392849194), we obtain a palindrome (99099099).

The spelling of 491948293 in words is "four hundred ninety-one million, nine hundred forty-eight thousand, two hundred ninety-three".