1279923103 has 2 divisors, whose sum is σ = 1279923104. Its totient is φ = 1279923102.

The previous prime is 1279923083. The next prime is 1279923121. The reversal of 1279923103 is 3013299721.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1279923103 - 2²¹ = 1277825951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1279921103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639961551 + 639961552.

It is an arithmetic number, because the mean of its divisors is an integer number (639961552).

Almost surely, 2^1279923103 is an apocalyptic number.

1279923103 is a deficient number, since it is larger than the sum of its proper divisors (1).

1279923103 is an equidigital number, since it uses as much as digits as its factorization.

1279923103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 1279923103 is about 35776.0129556104. The cubic root of 1279923103 is about 1085.7453034347.

The spelling of 1279923103 in words is "one billion, two hundred seventy-nine million, nine hundred twenty-three thousand, one hundred three".