1322999987 has 2 divisors, whose sum is σ = 1322999988. Its totient is φ = 1322999986.

The previous prime is 1322999983. The next prime is 1322999999. The reversal of 1322999987 is 7899992231.

It is a weak prime.

It is an emirp because it is prime and its reverse (7899992231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1322999987 - 2² = 1322999983 is a prime.

It is not a weakly prime, because it can be changed into another prime (1322999983) 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, 661499993 + 661499994.

It is an arithmetic number, because the mean of its divisors is an integer number (661499994).

Almost surely, 2^1322999987 is an apocalyptic number.

1322999987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1322999987 is an equidigital number, since it uses as much as digits as its factorization.

1322999987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4408992, while the sum is 59.

The square root of 1322999987 is about 36373.0667802428. The cubic root of 1322999987 is about 1097.7917094112.

The spelling of 1322999987 in words is "one billion, three hundred twenty-two million, nine hundred ninety-nine thousand, nine hundred eighty-seven".