1023125899 has 2 divisors, whose sum is σ = 1023125900. Its totient is φ = 1023125898.

The previous prime is 1023125897. The next prime is 1023125923. The reversal of 1023125899 is 9985213201.

It is a weak prime.

It is an emirp because it is prime and its reverse (9985213201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1023125899 - 2¹ = 1023125897 is a prime.

Together with 1023125897, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1023125893) 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, 511562949 + 511562950.

It is an arithmetic number, because the mean of its divisors is an integer number (511562950).

Almost surely, 2^1023125899 is an apocalyptic number.

1023125899 is a deficient number, since it is larger than the sum of its proper divisors (1).

1023125899 is an equidigital number, since it uses as much as digits as its factorization.

1023125899 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 1023125899 is about 31986.3392560011. The cubic root of 1023125899 is about 1007.6499618535.

The spelling of 1023125899 in words is "one billion, twenty-three million, one hundred twenty-five thousand, eight hundred ninety-nine".