1056198173 has 2 divisors, whose sum is σ = 1056198174. Its totient is φ = 1056198172.

The previous prime is 1056198149. The next prime is 1056198181. The reversal of 1056198173 is 3718916501.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1041159289 + 15038884 = 32267^2 + 3878^2 .

It is a cyclic number.

It is not a de Polignac number, because 1056198173 - 2¹⁸ = 1055936029 is a prime.

It is a super-2 number, since 2×1056198173² = 2231109161297075858, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1056198173.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1056198113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 528099086 + 528099087.

It is an arithmetic number, because the mean of its divisors is an integer number (528099087).

Almost surely, 2^1056198173 is an apocalyptic number.

It is an amenable number.

1056198173 is a deficient number, since it is larger than the sum of its proper divisors (1).

1056198173 is an equidigital number, since it uses as much as digits as its factorization.

1056198173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 41.

The square root of 1056198173 is about 32499.2026517575. The cubic root of 1056198173 is about 1018.3923710991.

The spelling of 1056198173 in words is "one billion, fifty-six million, one hundred ninety-eight thousand, one hundred seventy-three".