581620493 has 2 divisors, whose sum is σ = 581620494. Its totient is φ = 581620492.

The previous prime is 581620489. The next prime is 581620517. The reversal of 581620493 is 394026185.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 572022889 + 9597604 = 23917^2 + 3098^2 .

It is a cyclic number.

It is not a de Polignac number, because 581620493 - 2² = 581620489 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (581620423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 290810246 + 290810247.

It is an arithmetic number, because the mean of its divisors is an integer number (290810247).

Almost surely, 2^581620493 is an apocalyptic number.

It is an amenable number.

581620493 is a deficient number, since it is larger than the sum of its proper divisors (1).

581620493 is an equidigital number, since it uses as much as digits as its factorization.

581620493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 581620493 is about 24116.8093453508. The cubic root of 581620493 is about 834.7310465622.

The spelling of 581620493 in words is "five hundred eighty-one million, six hundred twenty thousand, four hundred ninety-three".