1020172173 has 8 divisors (see below), whose sum is σ = 1376618208. Its totient is φ = 671920464.

The previous prime is 1020172171. The next prime is 1020172189. The reversal of 1020172173 is 3712710201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1020172173 - 2¹ = 1020172171 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020172171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2048290 + ... + 2048787.

It is an arithmetic number, because the mean of its divisors is an integer number (172077276).

Almost surely, 2^1020172173 is an apocalyptic number.

It is an amenable number.

1020172173 is a deficient number, since it is larger than the sum of its proper divisors (356446035).

1020172173 is an equidigital number, since it uses as much as digits as its factorization.

1020172173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4097163.

The product of its (nonzero) digits is 588, while the sum is 24.

The square root of 1020172173 is about 31940.1342044770. The cubic root of 1020172173 is about 1006.6793446912.

Adding to 1020172173 its reverse (3712710201), we get a palindrome (4732882374).

The spelling of 1020172173 in words is "one billion, twenty million, one hundred seventy-two thousand, one hundred seventy-three".