1330312381 has 2 divisors, whose sum is σ = 1330312382. Its totient is φ = 1330312380.

The previous prime is 1330312367. The next prime is 1330312397. The reversal of 1330312381 is 1832130331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 752679225 + 577633156 = 27435^2 + 24034^2 .

It is an emirp because it is prime and its reverse (1832130331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1330312381 - 2²³ = 1321923773 is a prime.

It is a super-2 number, since 2×1330312381² = 3539462062083778322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1330312981) 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, 665156190 + 665156191.

It is an arithmetic number, because the mean of its divisors is an integer number (665156191).

Almost surely, 2^1330312381 is an apocalyptic number.

It is an amenable number.

1330312381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1330312381 is an equidigital number, since it uses as much as digits as its factorization.

1330312381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 1330312381 is about 36473.4476160398. The cubic root of 1330312381 is about 1099.8105406484.

The spelling of 1330312381 in words is "one billion, three hundred thirty million, three hundred twelve thousand, three hundred eighty-one".