1673435641 has 2 divisors, whose sum is σ = 1673435642. Its totient is φ = 1673435640.

The previous prime is 1673435639. The next prime is 1673435651. The reversal of 1673435641 is 1465343761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1269425641 + 404010000 = 35629^2 + 20100^2 .

It is a cyclic number.

It is not a de Polignac number, because 1673435641 - 2¹ = 1673435639 is a prime.

Together with 1673435639, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1673435594 and 1673435603.

It is not a weakly prime, because it can be changed into another prime (1673435651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 836717820 + 836717821.

It is an arithmetic number, because the mean of its divisors is an integer number (836717821).

Almost surely, 2^1673435641 is an apocalyptic number.

It is an amenable number.

1673435641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1673435641 is an equidigital number, since it uses as much as digits as its factorization.

1673435641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 40.

The square root of 1673435641 is about 40907.6477079775. The cubic root of 1673435641 is about 1187.2340347075.

The spelling of 1673435641 in words is "one billion, six hundred seventy-three million, four hundred thirty-five thousand, six hundred forty-one".