491934352913 has 2 divisors, whose sum is σ = 491934352914. Its totient is φ = 491934352912.

The previous prime is 491934352859. The next prime is 491934352933. The reversal of 491934352913 is 319253439194.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 437247595009 + 54686757904 = 661247^2 + 233852^2 .

It is a cyclic number.

It is not a de Polignac number, because 491934352913 - 2⁶ = 491934352849 is a prime.

It is not a weakly prime, because it can be changed into another prime (491934352933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245967176456 + 245967176457.

It is an arithmetic number, because the mean of its divisors is an integer number (245967176457).

Almost surely, 2^491934352913 is an apocalyptic number.

It is an amenable number.

491934352913 is a deficient number, since it is larger than the sum of its proper divisors (1).

491934352913 is an equidigital number, since it uses as much as digits as its factorization.

491934352913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3149280, while the sum is 53.

The spelling of 491934352913 in words is "four hundred ninety-one billion, nine hundred thirty-four million, three hundred fifty-two thousand, nine hundred thirteen".