1673217273841 has 3 divisors (see below), whose sum is σ = 1673218567371. Its totient is φ = 1673215980312.

The previous prime is 1673217273821. The next prime is 1673217273899. The reversal of 1673217273841 is 1483727123761.

The square root of 1673217273841 is 1293529.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 1509774955441 + 163442318400 = 1228729^2 + 404280^2 .

It is not a de Polignac number, because 1673217273841 - 2⁵ = 1673217273809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1673217273821) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 646765 + ... + 1940293.

It is an arithmetic number, because the mean of its divisors is an integer number (557739522457).

Almost surely, 2^{1673217273841} is an apocalyptic number.

1673217273841 is the 1293529-th square number.

1673217273841 is the 646765-th centered octagonal number.

It is an amenable number.

1673217273841 is a deficient number, since it is larger than the sum of its proper divisors (1293530).

1673217273841 is an frugal number, since it uses more digits than its factorization.

1673217273841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2587058 (or 1293529 counting only the distinct ones).

The product of its digits is 2370816, while the sum is 52.

The spelling of 1673217273841 in words is "one trillion, six hundred seventy-three billion, two hundred seventeen million, two hundred seventy-three thousand, eight hundred forty-one".