1264423169 has 2 divisors, whose sum is σ = 1264423170. Its totient is φ = 1264423168.

The previous prime is 1264423087. The next prime is 1264423219. The reversal of 1264423169 is 9613244621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1263447025 + 976144 = 35545^2 + 988^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1264423169 is a prime.

It is a super-2 number, since 2×1264423169² = 3197531900608005122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1264423669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632211584 + 632211585.

It is an arithmetic number, because the mean of its divisors is an integer number (632211585).

Almost surely, 2^1264423169 is an apocalyptic number.

It is an amenable number.

1264423169 is a deficient number, since it is larger than the sum of its proper divisors (1).

1264423169 is an equidigital number, since it uses as much as digits as its factorization.

1264423169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 38.

The square root of 1264423169 is about 35558.7284502694. The cubic root of 1264423169 is about 1081.3446811004.

The spelling of 1264423169 in words is "one billion, two hundred sixty-four million, four hundred twenty-three thousand, one hundred sixty-nine".