201985792493 has 2 divisors, whose sum is σ = 201985792494. Its totient is φ = 201985792492.

The previous prime is 201985792441. The next prime is 201985792579. The reversal of 201985792493 is 394297589102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111127556164 + 90858236329 = 333358^2 + 301427^2 .

It is a cyclic number.

It is not a de Polignac number, because 201985792493 - 2¹² = 201985788397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201985792403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100992896246 + 100992896247.

It is an arithmetic number, because the mean of its divisors is an integer number (100992896247).

Almost surely, 2^201985792493 is an apocalyptic number.

It is an amenable number.

201985792493 is a deficient number, since it is larger than the sum of its proper divisors (1).

201985792493 is an equidigital number, since it uses as much as digits as its factorization.

201985792493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9797760, while the sum is 59.

The spelling of 201985792493 in words is "two hundred one billion, nine hundred eighty-five million, seven hundred ninety-two thousand, four hundred ninety-three".