1205916017 has 2 divisors, whose sum is σ = 1205916018. Its totient is φ = 1205916016.

The previous prime is 1205916007. The next prime is 1205916031. The reversal of 1205916017 is 7106195021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 815616481 + 390299536 = 28559^2 + 19756^2 .

It is a cyclic number.

It is not a de Polignac number, because 1205916017 - 2²⁸ = 937480561 is a prime.

It is not a weakly prime, because it can be changed into another prime (1205916007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 602958008 + 602958009.

It is an arithmetic number, because the mean of its divisors is an integer number (602958009).

Almost surely, 2^1205916017 is an apocalyptic number.

It is an amenable number.

1205916017 is a deficient number, since it is larger than the sum of its proper divisors (1).

1205916017 is an equidigital number, since it uses as much as digits as its factorization.

1205916017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3780, while the sum is 32.

The square root of 1205916017 is about 34726.3015162859. The cubic root of 1205916017 is about 1064.4020145105.

The spelling of 1205916017 in words is "one billion, two hundred five million, nine hundred sixteen thousand, seventeen".