1025689799 has 2 divisors, whose sum is σ = 1025689800. Its totient is φ = 1025689798.

The previous prime is 1025689733. The next prime is 1025689817. The reversal of 1025689799 is 9979865201.

1025689799 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1025689799 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 (1025682799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 512844899 + 512844900.

It is an arithmetic number, because the mean of its divisors is an integer number (512844900).

Almost surely, 2^1025689799 is an apocalyptic number.

1025689799 is a deficient number, since it is larger than the sum of its proper divisors (1).

1025689799 is an equidigital number, since it uses as much as digits as its factorization.

1025689799 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2449440, while the sum is 56.

The square root of 1025689799 is about 32026.3922257878. The cubic root of 1025689799 is about 1008.4909657772.

The spelling of 1025689799 in words is "one billion, twenty-five million, six hundred eighty-nine thousand, seven hundred ninety-nine".