1604685943 has 8 divisors (see below), whose sum is σ = 1834201088. Its totient is φ = 1375239384.

The previous prime is 1604685899. The next prime is 1604685977. The reversal of 1604685943 is 3495864061.

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 1604685943 - 2⁹ = 1604685431 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1604685893 and 1604685902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1604685143) 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, 51130 + ... + 76312.

It is an arithmetic number, because the mean of its divisors is an integer number (229275136).

Almost surely, 2^1604685943 is an apocalyptic number.

1604685943 is a deficient number, since it is larger than the sum of its proper divisors (229515145).

1604685943 is an equidigital number, since it uses as much as digits as its factorization.

1604685943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34293.

The product of its (nonzero) digits is 622080, while the sum is 46.

The square root of 1604685943 is about 40058.5314633475. The cubic root of 1604685943 is about 1170.7477974496.

The spelling of 1604685943 in words is "one billion, six hundred four million, six hundred eighty-five thousand, nine hundred forty-three".