1331303249 has 2 divisors, whose sum is σ = 1331303250. Its totient is φ = 1331303248.

The previous prime is 1331303231. The next prime is 1331303279. The reversal of 1331303249 is 9423031331.

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., 1329112849 + 2190400 = 36457^2 + 1480^2 .

It is a cyclic number.

It is not a de Polignac number, because 1331303249 - 2⁸ = 1331302993 is a prime.

It is not a weakly prime, because it can be changed into another prime (1331303279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665651624 + 665651625.

It is an arithmetic number, because the mean of its divisors is an integer number (665651625).

Almost surely, 2^1331303249 is an apocalyptic number.

It is an amenable number.

1331303249 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331303249 is an equidigital number, since it uses as much as digits as its factorization.

1331303249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 29.

The square root of 1331303249 is about 36487.0285032914. The cubic root of 1331303249 is about 1100.0835333258.

The spelling of 1331303249 in words is "one billion, three hundred thirty-one million, three hundred three thousand, two hundred forty-nine".