1209291103 has 2 divisors, whose sum is σ = 1209291104. Its totient is φ = 1209291102.

The previous prime is 1209291077. The next prime is 1209291131. The reversal of 1209291103 is 3011929021.

It is an a-pointer prime, because the next prime (1209291131) can be obtained adding 1209291103 to its sum of digits (28).

It is a weak prime.

It is an emirp because it is prime and its reverse (3011929021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1209291103 - 2¹⁷ = 1209160031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1209291163) 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, 604645551 + 604645552.

It is an arithmetic number, because the mean of its divisors is an integer number (604645552).

Almost surely, 2^1209291103 is an apocalyptic number.

1209291103 is a deficient number, since it is larger than the sum of its proper divisors (1).

1209291103 is an equidigital number, since it uses as much as digits as its factorization.

1209291103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 1209291103 is about 34774.8630910317. The cubic root of 1209291103 is about 1065.3940963263.

The spelling of 1209291103 in words is "one billion, two hundred nine million, two hundred ninety-one thousand, one hundred three".