1022321987 has 2 divisors, whose sum is σ = 1022321988. Its totient is φ = 1022321986.

The previous prime is 1022321983. The next prime is 1022322011. The reversal of 1022321987 is 7891232201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1022321987 - 2² = 1022321983 is a prime.

It is not a weakly prime, because it can be changed into another prime (1022321981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511160993 + 511160994.

It is an arithmetic number, because the mean of its divisors is an integer number (511160994).

Almost surely, 2^1022321987 is an apocalyptic number.

1022321987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1022321987 is an equidigital number, since it uses as much as digits as its factorization.

1022321987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 1022321987 is about 31973.7702969168. The cubic root of 1022321987 is about 1007.3859753927.

The spelling of 1022321987 in words is "one billion, twenty-two million, three hundred twenty-one thousand, nine hundred eighty-seven".