620171173 has 2 divisors, whose sum is σ = 620171174. Its totient is φ = 620171172.

The previous prime is 620171143. The next prime is 620171197. The reversal of 620171173 is 371171026.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 614940804 + 5230369 = 24798^2 + 2287^2 .

It is a cyclic number.

It is not a de Polignac number, because 620171173 - 2¹³ = 620162981 is a prime.

It is a super-2 number, since 2×620171173² = 769224567640391858, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (620171113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310085586 + 310085587.

It is an arithmetic number, because the mean of its divisors is an integer number (310085587).

Almost surely, 2^620171173 is an apocalyptic number.

It is an amenable number.

620171173 is a deficient number, since it is larger than the sum of its proper divisors (1).

620171173 is an equidigital number, since it uses as much as digits as its factorization.

620171173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1764, while the sum is 28.

The square root of 620171173 is about 24903.2361953221. The cubic root of 620171173 is about 852.7803639796.

It can be divided in two parts, 62017 and 1173, that added together give a triangular number (63190 = T₃₅₅).

The spelling of 620171173 in words is "six hundred twenty million, one hundred seventy-one thousand, one hundred seventy-three".