1022999987 has 2 divisors, whose sum is σ = 1022999988. Its totient is φ = 1022999986.

The previous prime is 1022999977. The next prime is 1023000023. The reversal of 1022999987 is 7899992201.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1022999987 is a prime.

It is not a weakly prime, because it can be changed into another prime (1022999977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511499993 + 511499994.

It is an arithmetic number, because the mean of its divisors is an integer number (511499994).

Almost surely, 2^1022999987 is an apocalyptic number.

1022999987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1022999987 is an equidigital number, since it uses as much as digits as its factorization.

1022999987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1469664, while the sum is 56.

The square root of 1022999987 is about 31984.3709802147. The cubic root of 1022999987 is about 1007.6086243449.

The spelling of 1022999987 in words is "one billion, twenty-two million, nine hundred ninety-nine thousand, nine hundred eighty-seven".