1025808899 has 2 divisors, whose sum is σ = 1025808900. Its totient is φ = 1025808898.

The previous prime is 1025808871. The next prime is 1025808943. The reversal of 1025808899 is 9988085201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1025808899 - 2¹⁶ = 1025743363 is a prime.

It is not a weakly prime, because it can be changed into another prime (1025808859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 512904449 + 512904450.

It is an arithmetic number, because the mean of its divisors is an integer number (512904450).

Almost surely, 2^1025808899 is an apocalyptic number.

1025808899 is a deficient number, since it is larger than the sum of its proper divisors (1).

1025808899 is an equidigital number, since it uses as much as digits as its factorization.

1025808899 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 414720, while the sum is 50.

The square root of 1025808899 is about 32028.2515757573. The cubic root of 1025808899 is about 1008.5299985743.

The spelling of 1025808899 in words is "one billion, twenty-five million, eight hundred eight thousand, eight hundred ninety-nine".