1263841673 has 2 divisors, whose sum is σ = 1263841674. Its totient is φ = 1263841672.

The previous prime is 1263841669. The next prime is 1263841723. The reversal of 1263841673 is 3761483621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 766016329 + 497825344 = 27677^2 + 22312^2 .

It is a cyclic number.

It is not a de Polignac number, because 1263841673 - 2² = 1263841669 is a prime.

It is a super-2 number, since 2×1263841673² = 3194591548822877858, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1263841673.

It is not a weakly prime, because it can be changed into another prime (1263841603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631920836 + 631920837.

It is an arithmetic number, because the mean of its divisors is an integer number (631920837).

Almost surely, 2^1263841673 is an apocalyptic number.

It is an amenable number.

1263841673 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263841673 is an equidigital number, since it uses as much as digits as its factorization.

1263841673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 41.

The square root of 1263841673 is about 35550.5509521301. The cubic root of 1263841673 is about 1081.1788890251.

The spelling of 1263841673 in words is "one billion, two hundred sixty-three million, eight hundred forty-one thousand, six hundred seventy-three".