1673723641 has 4 divisors (see below), whose sum is σ = 1682486784. Its totient is φ = 1664960500.

The previous prime is 1673723581. The next prime is 1673723647. The reversal of 1673723641 is 1463273761.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1673723641 - 2¹⁵ = 1673690873 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1673723594 and 1673723603.

It is not an unprimeable number, because it can be changed into a prime (1673723647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4381285 + ... + 4381666.

It is an arithmetic number, because the mean of its divisors is an integer number (420621696).

Almost surely, 2^1673723641 is an apocalyptic number.

It is an amenable number.

1673723641 is a deficient number, since it is larger than the sum of its proper divisors (8763143).

1673723641 is an equidigital number, since it uses as much as digits as its factorization.

1673723641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8763142.

The product of its digits is 127008, while the sum is 40.

The square root of 1673723641 is about 40911.1676807201. The cubic root of 1673723641 is about 1187.3021388680.

The spelling of 1673723641 in words is "one billion, six hundred seventy-three million, seven hundred twenty-three thousand, six hundred forty-one".