1294661089 has 2 divisors, whose sum is σ = 1294661090. Its totient is φ = 1294661088.

The previous prime is 1294661087. The next prime is 1294661111. The reversal of 1294661089 is 9801664921.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1288451025 + 6210064 = 35895^2 + 2492^2 .

It is an emirp because it is prime and its reverse (9801664921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1294661089 - 2¹ = 1294661087 is a prime.

It is a super-2 number, since 2×1294661089² = 3352294670741331842, which contains 22 as substring.

Together with 1294661087, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1294661087) 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, 647330544 + 647330545.

It is an arithmetic number, because the mean of its divisors is an integer number (647330545).

Almost surely, 2^1294661089 is an apocalyptic number.

It is an amenable number.

1294661089 is a deficient number, since it is larger than the sum of its proper divisors (1).

1294661089 is an equidigital number, since it uses as much as digits as its factorization.

1294661089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 46.

The square root of 1294661089 is about 35981.3992084799. The cubic root of 1294661089 is about 1089.8967691143.

The spelling of 1294661089 in words is "one billion, two hundred ninety-four million, six hundred sixty-one thousand, eighty-nine".