1958170897 has 2 divisors, whose sum is σ = 1958170898. Its totient is φ = 1958170896.

The previous prime is 1958170873. The next prime is 1958170909. The reversal of 1958170897 is 7980718591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1045164241 + 913006656 = 32329^2 + 30216^2 .

It is a cyclic number.

It is not a de Polignac number, because 1958170897 - 2¹⁵ = 1958138129 is a prime.

It is not a weakly prime, because it can be changed into another prime (1958170817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 979085448 + 979085449.

It is an arithmetic number, because the mean of its divisors is an integer number (979085449).

Almost surely, 2^1958170897 is an apocalyptic number.

It is an amenable number.

1958170897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1958170897 is an equidigital number, since it uses as much as digits as its factorization.

1958170897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1270080, while the sum is 55.

The square root of 1958170897 is about 44251.2248079079. The cubic root of 1958170897 is about 1251.0755323454.

The spelling of 1958170897 in words is "one billion, nine hundred fifty-eight million, one hundred seventy thousand, eight hundred ninety-seven".