1321143077 has 2 divisors, whose sum is σ = 1321143078. Its totient is φ = 1321143076.

The previous prime is 1321143071. The next prime is 1321143097. The reversal of 1321143077 is 7703411231.

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., 1070205796 + 250937281 = 32714^2 + 15841^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321143077 - 2¹² = 1321138981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321143071) 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, 660571538 + 660571539.

It is an arithmetic number, because the mean of its divisors is an integer number (660571539).

Almost surely, 2^1321143077 is an apocalyptic number.

It is an amenable number.

1321143077 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321143077 is an equidigital number, since it uses as much as digits as its factorization.

1321143077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 1321143077 is about 36347.5319244650. The cubic root of 1321143077 is about 1097.2778633828.

The spelling of 1321143077 in words is "one billion, three hundred twenty-one million, one hundred forty-three thousand, seventy-seven".