1322891651 has 2 divisors, whose sum is σ = 1322891652. Its totient is φ = 1322891650.

The previous prime is 1322891623. The next prime is 1322891653. The reversal of 1322891651 is 1561982231.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (1561982231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1322891651 - 2¹⁸ = 1322629507 is a prime.

Together with 1322891653, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1322891653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661445825 + 661445826.

It is an arithmetic number, because the mean of its divisors is an integer number (661445826).

Almost surely, 2^1322891651 is an apocalyptic number.

1322891651 is a deficient number, since it is larger than the sum of its proper divisors (1).

1322891651 is an equidigital number, since it uses as much as digits as its factorization.

1322891651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 38.

The square root of 1322891651 is about 36371.5775159671. The cubic root of 1322891651 is about 1097.7617437750.

The spelling of 1322891651 in words is "one billion, three hundred twenty-two million, eight hundred ninety-one thousand, six hundred fifty-one".