1609393823 has 4 divisors (see below), whose sum is σ = 1609529088. Its totient is φ = 1609258560.

The previous prime is 1609393817. The next prime is 1609393837. The reversal of 1609393823 is 3283939061.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1609393823 - 2⁶ = 1609393759 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 (1609393883) 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, 47858 + ... + 74223.

It is an arithmetic number, because the mean of its divisors is an integer number (402382272).

Almost surely, 2^1609393823 is an apocalyptic number.

1609393823 is a deficient number, since it is larger than the sum of its proper divisors (135265).

1609393823 is a wasteful number, since it uses less digits than its factorization.

1609393823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135264.

The product of its (nonzero) digits is 209952, while the sum is 44.

The square root of 1609393823 is about 40117.2509402127. The cubic root of 1609393823 is about 1171.8916056318.

The spelling of 1609393823 in words is "one billion, six hundred nine million, three hundred ninety-three thousand, eight hundred twenty-three".