1259679899 has 2 divisors, whose sum is σ = 1259679900. Its totient is φ = 1259679898.

The previous prime is 1259679881. The next prime is 1259679907. The reversal of 1259679899 is 9989769521.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1259679899 is a prime.

It is not a weakly prime, because it can be changed into another prime (1259679199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 629839949 + 629839950.

It is an arithmetic number, because the mean of its divisors is an integer number (629839950).

Almost surely, 2^1259679899 is an apocalyptic number.

1259679899 is a deficient number, since it is larger than the sum of its proper divisors (1).

1259679899 is an equidigital number, since it uses as much as digits as its factorization.

1259679899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22044960, while the sum is 65.

The square root of 1259679899 is about 35491.9695001559. The cubic root of 1259679899 is about 1079.9908261109.

The spelling of 1259679899 in words is "one billion, two hundred fifty-nine million, six hundred seventy-nine thousand, eight hundred ninety-nine".