1064630221 has 2 divisors, whose sum is σ = 1064630222. Its totient is φ = 1064630220.

The previous prime is 1064630197. The next prime is 1064630243. The reversal of 1064630221 is 1220364601.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 847392100 + 217238121 = 29110^2 + 14739^2 .

It is a cyclic number.

It is not a de Polignac number, because 1064630221 - 2⁷ = 1064630093 is a prime.

It is a super-2 number, since 2×1064630221² = 2266875014933017682, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1064630261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 532315110 + 532315111.

It is an arithmetic number, because the mean of its divisors is an integer number (532315111).

Almost surely, 2^1064630221 is an apocalyptic number.

It is an amenable number.

1064630221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1064630221 is an equidigital number, since it uses as much as digits as its factorization.

1064630221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 1064630221 is about 32628.6717627304. The cubic root of 1064630221 is about 1021.0952674859.

Adding to 1064630221 its reverse (1220364601), we get a palindrome (2284994822).

The spelling of 1064630221 in words is "one billion, sixty-four million, six hundred thirty thousand, two hundred twenty-one".