1022987987 has 8 divisors (see below), whose sum is σ = 1230662400. Its totient is φ = 830696904.

The previous prime is 1022987981. The next prime is 1022987989. The reversal of 1022987987 is 7897892201.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1022987987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1022987981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3845687 + ... + 3845952.

It is an arithmetic number, because the mean of its divisors is an integer number (153832800).

Almost surely, 2^1022987987 is an apocalyptic number.

1022987987 is a deficient number, since it is larger than the sum of its proper divisors (207674413).

1022987987 is an equidigital number, since it uses as much as digits as its factorization.

1022987987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7691665.

The product of its (nonzero) digits is 1016064, while the sum is 53.

The square root of 1022987987 is about 31984.1833880435. The cubic root of 1022987987 is about 1007.6046845107.

The spelling of 1022987987 in words is "one billion, twenty-two million, nine hundred eighty-seven thousand, nine hundred eighty-seven".