1225917193 has 2 divisors, whose sum is σ = 1225917194. Its totient is φ = 1225917192.

The previous prime is 1225917131. The next prime is 1225917233. The reversal of 1225917193 is 3917195221.

It is an a-pointer prime, because the next prime (1225917233) can be obtained adding 1225917193 to its sum of digits (40).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 743543824 + 482373369 = 27268^2 + 21963^2 .

It is a cyclic number.

It is not a de Polignac number, because 1225917193 - 2¹³ = 1225909001 is a prime.

It is not a weakly prime, because it can be changed into another prime (1225917893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612958596 + 612958597.

It is an arithmetic number, because the mean of its divisors is an integer number (612958597).

Almost surely, 2^1225917193 is an apocalyptic number.

It is an amenable number.

1225917193 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225917193 is an equidigital number, since it uses as much as digits as its factorization.

1225917193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34020, while the sum is 40.

The square root of 1225917193 is about 35013.1003054571. The cubic root of 1225917193 is about 1070.2544574899.

The spelling of 1225917193 in words is "one billion, two hundred twenty-five million, nine hundred seventeen thousand, one hundred ninety-three".