1321423049 has 2 divisors, whose sum is σ = 1321423050. Its totient is φ = 1321423048.

The previous prime is 1321423031. The next prime is 1321423079. The reversal of 1321423049 is 9403241231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1172583049 + 148840000 = 34243^2 + 12200^2 .

It is an emirp because it is prime and its reverse (9403241231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1321423049 - 2⁸ = 1321422793 is a prime.

It is not a weakly prime, because it can be changed into another prime (1321423009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660711524 + 660711525.

It is an arithmetic number, because the mean of its divisors is an integer number (660711525).

Almost surely, 2^1321423049 is an apocalyptic number.

It is an amenable number.

1321423049 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321423049 is an equidigital number, since it uses as much as digits as its factorization.

1321423049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 1321423049 is about 36351.3830410894. The cubic root of 1321423049 is about 1097.3553683316.

It can be divided in two parts, 13214 and 23049, that added together give a palindrome (36263).

The spelling of 1321423049 in words is "one billion, three hundred twenty-one million, four hundred twenty-three thousand, forty-nine".