1321286293 has 2 divisors, whose sum is σ = 1321286294. Its totient is φ = 1321286292.

The previous prime is 1321286191. The next prime is 1321286333. The reversal of 1321286293 is 3926821231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1318997124 + 2289169 = 36318^2 + 1513^2 .

It is an emirp because it is prime and its reverse (3926821231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1321286293 - 2²¹ = 1319189141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321286093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660643146 + 660643147.

It is an arithmetic number, because the mean of its divisors is an integer number (660643147).

Almost surely, 2^1321286293 is an apocalyptic number.

It is an amenable number.

1321286293 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321286293 is an equidigital number, since it uses as much as digits as its factorization.

1321286293 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 37.

The square root of 1321286293 is about 36349.5019635758. The cubic root of 1321286293 is about 1097.3175113894.

The spelling of 1321286293 in words is "one billion, three hundred twenty-one million, two hundred eighty-six thousand, two hundred ninety-three".