863220493 has 2 divisors, whose sum is σ = 863220494. Its totient is φ = 863220492.

The previous prime is 863220469. The next prime is 863220499. The reversal of 863220493 is 394022368.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 549292969 + 313927524 = 23437^2 + 17718^2 .

It is a cyclic number.

It is not a de Polignac number, because 863220493 - 2⁵ = 863220461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (863220499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 431610246 + 431610247.

It is an arithmetic number, because the mean of its divisors is an integer number (431610247).

Almost surely, 2^863220493 is an apocalyptic number.

It is an amenable number.

863220493 is a deficient number, since it is larger than the sum of its proper divisors (1).

863220493 is an equidigital number, since it uses as much as digits as its factorization.

863220493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 863220493 is about 29380.6142379631. The cubic root of 863220493 is about 952.1541120731.

The spelling of 863220493 in words is "eight hundred sixty-three million, two hundred twenty thousand, four hundred ninety-three".