1020104399 has 2 divisors, whose sum is σ = 1020104400. Its totient is φ = 1020104398.

The previous prime is 1020104389. The next prime is 1020104417. The reversal of 1020104399 is 9934010201.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1020104399 - 2⁸ = 1020104143 is a prime.

It is a super-2 number, since 2×1020104399² = 2081225969718302402, which contains 22 as substring.

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 (1020104359) 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 as a sum of consecutive naturals, namely, 510052199 + 510052200.

It is an arithmetic number, because the mean of its divisors is an integer number (510052200).

Almost surely, 2^1020104399 is an apocalyptic number.

1020104399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020104399 is an equidigital number, since it uses as much as digits as its factorization.

1020104399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 1020104399 is about 31939.0732332671. The cubic root of 1020104399 is about 1006.6570516578.

The spelling of 1020104399 in words is "one billion, twenty million, one hundred four thousand, three hundred ninety-nine".