921200916593 has 2 divisors, whose sum is σ = 921200916594. Its totient is φ = 921200916592.

The previous prime is 921200916583. The next prime is 921200916667. The reversal of 921200916593 is 395619002129.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 635738318224 + 285462598369 = 797332^2 + 534287^2 .

It is a cyclic number.

It is not a de Polignac number, because 921200916593 - 2⁶ = 921200916529 is a prime.

It is a super-2 number, since 2×921200916593² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (921200916533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460600458296 + 460600458297.

It is an arithmetic number, because the mean of its divisors is an integer number (460600458297).

Almost surely, 2^921200916593 is an apocalyptic number.

It is an amenable number.

921200916593 is a deficient number, since it is larger than the sum of its proper divisors (1).

921200916593 is an equidigital number, since it uses as much as digits as its factorization.

921200916593 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 262440, while the sum is 47.

The spelling of 921200916593 in words is "nine hundred twenty-one billion, two hundred million, nine hundred sixteen thousand, five hundred ninety-three".