1717905961 has 2 divisors, whose sum is σ = 1717905962. Its totient is φ = 1717905960.

The previous prime is 1717905953. The next prime is 1717905979. The reversal of 1717905961 is 1695097171.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1061521561 + 656384400 = 32581^2 + 25620^2 .

It is a cyclic number.

It is not a de Polignac number, because 1717905961 - 2³ = 1717905953 is a prime.

It is not a weakly prime, because it can be changed into another prime (1717905911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 858952980 + 858952981.

It is an arithmetic number, because the mean of its divisors is an integer number (858952981).

Almost surely, 2^1717905961 is an apocalyptic number.

It is an amenable number.

1717905961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1717905961 is an equidigital number, since it uses as much as digits as its factorization.

1717905961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 119070, while the sum is 46.

The square root of 1717905961 is about 41447.6291360555. The cubic root of 1717905961 is about 1197.6588523917.

The spelling of 1717905961 in words is "one billion, seven hundred seventeen million, nine hundred five thousand, nine hundred sixty-one".