1975216717 has 2 divisors, whose sum is σ = 1975216718. Its totient is φ = 1975216716.

The previous prime is 1975216643. The next prime is 1975216777. The reversal of 1975216717 is 7176125791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1591291881 + 383924836 = 39891^2 + 19594^2 .

It is a cyclic number.

It is not a de Polignac number, because 1975216717 - 2¹¹ = 1975214669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1975216777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 987608358 + 987608359.

It is an arithmetic number, because the mean of its divisors is an integer number (987608359).

Almost surely, 2^1975216717 is an apocalyptic number.

It is an amenable number.

1975216717 is a deficient number, since it is larger than the sum of its proper divisors (1).

1975216717 is an equidigital number, since it uses as much as digits as its factorization.

1975216717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 185220, while the sum is 46.

The square root of 1975216717 is about 44443.4102764403. The cubic root of 1975216717 is about 1254.6952413122.

The spelling of 1975216717 in words is "one billion, nine hundred seventy-five million, two hundred sixteen thousand, seven hundred seventeen".