1323645451 has 2 divisors, whose sum is σ = 1323645452. Its totient is φ = 1323645450.

The previous prime is 1323645371. The next prime is 1323645457. The reversal of 1323645451 is 1545463231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1323645451 - 2²⁹ = 786774539 is a prime.

It is not a weakly prime, because it can be changed into another prime (1323645457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661822725 + 661822726.

It is an arithmetic number, because the mean of its divisors is an integer number (661822726).

Almost surely, 2^1323645451 is an apocalyptic number.

1323645451 is a deficient number, since it is larger than the sum of its proper divisors (1).

1323645451 is an equidigital number, since it uses as much as digits as its factorization.

1323645451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43200, while the sum is 34.

The square root of 1323645451 is about 36381.9385272418. The cubic root of 1323645451 is about 1097.9702102506.

The spelling of 1323645451 in words is "one billion, three hundred twenty-three million, six hundred forty-five thousand, four hundred fifty-one".