1604968769 has 4 divisors (see below), whose sum is σ = 1612039344. Its totient is φ = 1597898196.

The previous prime is 1604968751. The next prime is 1604968787. The reversal of 1604968769 is 9678694061.

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 an interprime number because it is at equal distance from previous prime (1604968751) and next prime (1604968787).

It is a cyclic number.

It is not a de Polignac number, because 1604968769 - 2²⁰ = 1603920193 is a prime.

It is a super-2 number, since 2×1604968769² = 5151849498930750722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1604968709) 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, 3534947 + ... + 3535400.

It is an arithmetic number, because the mean of its divisors is an integer number (403009836).

Almost surely, 2^1604968769 is an apocalyptic number.

It is an amenable number.

1604968769 is a deficient number, since it is larger than the sum of its proper divisors (7070575).

1604968769 is an equidigital number, since it uses as much as digits as its factorization.

1604968769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7070574.

The product of its (nonzero) digits is 3919104, while the sum is 56.

The square root of 1604968769 is about 40062.0614671786. The cubic root of 1604968769 is about 1170.8165748671.

The spelling of 1604968769 in words is "one billion, six hundred four million, nine hundred sixty-eight thousand, seven hundred sixty-nine".