1303342921 has 2 divisors, whose sum is σ = 1303342922. Its totient is φ = 1303342920.

The previous prime is 1303342913. The next prime is 1303342933. The reversal of 1303342921 is 1292433031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 878529600 + 424813321 = 29640^2 + 20611^2 .

It is a cyclic number.

It is not a de Polignac number, because 1303342921 - 2³ = 1303342913 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1303342921.

It is not a weakly prime, because it can be changed into another prime (1303349921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 651671460 + 651671461.

It is an arithmetic number, because the mean of its divisors is an integer number (651671461).

Almost surely, 2^1303342921 is an apocalyptic number.

It is an amenable number.

1303342921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1303342921 is an equidigital number, since it uses as much as digits as its factorization.

1303342921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 1303342921 is about 36101.8409641392. The cubic root of 1303342921 is about 1092.3275798185.

Adding to 1303342921 its reverse (1292433031), we get a palindrome (2595775952).

The spelling of 1303342921 in words is "one billion, three hundred three million, three hundred forty-two thousand, nine hundred twenty-one".