1673820613 has 8 divisors (see below), whose sum is σ = 1746999576. Its totient is φ = 1602182400.

The previous prime is 1673820601. The next prime is 1673820647. The reversal of 1673820613 is 3160283761.

It can be written as a sum of positive squares in 4 ways, for example, as 267420609 + 1406400004 = 16353^2 + 37502^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1673820613 - 2¹⁷ = 1673689541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1673820683) 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, 382968 + ... + 387313.

It is an arithmetic number, because the mean of its divisors is an integer number (218374947).

Almost surely, 2^1673820613 is an apocalyptic number.

It is an amenable number.

1673820613 is a deficient number, since it is larger than the sum of its proper divisors (73178963).

1673820613 is an equidigital number, since it uses as much as digits as its factorization.

1673820613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770375.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 1673820613 is about 40912.3528167227. The cubic root of 1673820613 is about 1187.3250683483.

The spelling of 1673820613 in words is "one billion, six hundred seventy-three million, eight hundred twenty thousand, six hundred thirteen".