1324630381 has 2 divisors, whose sum is σ = 1324630382. Its totient is φ = 1324630380.

The previous prime is 1324630319. The next prime is 1324630423. The reversal of 1324630381 is 1830364231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 887444100 + 437186281 = 29790^2 + 20909^2 .

It is a cyclic number.

It is not a de Polignac number, because 1324630381 - 2²¹ = 1322533229 is a prime.

It is a super-2 number, since 2×1324630381² = 3509291292536410322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1324630981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 662315190 + 662315191.

It is an arithmetic number, because the mean of its divisors is an integer number (662315191).

Almost surely, 2^1324630381 is an apocalyptic number.

It is an amenable number.

1324630381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1324630381 is an equidigital number, since it uses as much as digits as its factorization.

1324630381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 1324630381 is about 36395.4719848500. The cubic root of 1324630381 is about 1098.2424774398.

The spelling of 1324630381 in words is "one billion, three hundred twenty-four million, six hundred thirty thousand, three hundred eighty-one".