9921363457 has 2 divisors, whose sum is σ = 9921363458. Its totient is φ = 9921363456.

The previous prime is 9921363427. The next prime is 9921363479. The reversal of 9921363457 is 7543631299.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9108030096 + 813333361 = 95436^2 + 28519^2 .

It is a cyclic number.

It is not a de Polignac number, because 9921363457 - 2¹⁵ = 9921330689 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9921363457.

It is not a weakly prime, because it can be changed into another prime (9921363427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4960681728 + 4960681729.

It is an arithmetic number, because the mean of its divisors is an integer number (4960681729).

Almost surely, 2^9921363457 is an apocalyptic number.

It is an amenable number.

9921363457 is a deficient number, since it is larger than the sum of its proper divisors (1).

9921363457 is an equidigital number, since it uses as much as digits as its factorization.

9921363457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1224720, while the sum is 49.

The square root of 9921363457 is about 99606.0412675858. The cubic root of 9921363457 is about 2148.7725791617.

The spelling of 9921363457 in words is "nine billion, nine hundred twenty-one million, three hundred sixty-three thousand, four hundred fifty-seven".