490691720593 has 2 divisors, whose sum is σ = 490691720594. Its totient is φ = 490691720592.

The previous prime is 490691720537. The next prime is 490691720621. The reversal of 490691720593 is 395027196094.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 359540546689 + 131151173904 = 599617^2 + 362148^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-490691720593 is a prime.

It is not a weakly prime, because it can be changed into another prime (490691720693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245345860296 + 245345860297.

It is an arithmetic number, because the mean of its divisors is an integer number (245345860297).

Almost surely, 2^490691720593 is an apocalyptic number.

It is an amenable number.

490691720593 is a deficient number, since it is larger than the sum of its proper divisors (1).

490691720593 is an equidigital number, since it uses as much as digits as its factorization.

490691720593 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3674160, while the sum is 55.

The spelling of 490691720593 in words is "four hundred ninety billion, six hundred ninety-one million, seven hundred twenty thousand, five hundred ninety-three".