622747393 has 2 divisors, whose sum is σ = 622747394. Its totient is φ = 622747392.

The previous prime is 622747357. The next prime is 622747397. The reversal of 622747393 is 393747226.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 574417089 + 48330304 = 23967^2 + 6952^2 .

It is a cyclic number.

It is not a de Polignac number, because 622747393 - 2⁹ = 622746881 is a prime.

It is not a weakly prime, because it can be changed into another prime (622747397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311373696 + 311373697.

It is an arithmetic number, because the mean of its divisors is an integer number (311373697).

Almost surely, 2^622747393 is an apocalyptic number.

It is an amenable number.

622747393 is a deficient number, since it is larger than the sum of its proper divisors (1).

622747393 is an equidigital number, since it uses as much as digits as its factorization.

622747393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 381024, while the sum is 43.

The square root of 622747393 is about 24954.9071927747. The cubic root of 622747393 is about 853.9595624808.

The spelling of 622747393 in words is "six hundred twenty-two million, seven hundred forty-seven thousand, three hundred ninety-three".