1020099959 has 2 divisors, whose sum is σ = 1020099960. Its totient is φ = 1020099958.

The previous prime is 1020099923. The next prime is 1020100001. The reversal of 1020099959 is 9599900201.

It is a weak prime.

It is an emirp because it is prime and its reverse (9599900201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1020099959 - 2²⁴ = 1003322743 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020099559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510049979 + 510049980.

It is an arithmetic number, because the mean of its divisors is an integer number (510049980).

Almost surely, 2^1020099959 is an apocalyptic number.

1020099959 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020099959 is an equidigital number, since it uses as much as digits as its factorization.

1020099959 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 65610, while the sum is 44.

The square root of 1020099959 is about 31939.0037258522. The cubic root of 1020099959 is about 1006.6555911656.

The spelling of 1020099959 in words is "one billion, twenty million, ninety-nine thousand, nine hundred fifty-nine".