1609409893 has 16 divisors (see below), whose sum is σ = 1981952896. Its totient is φ = 1272646080.

The previous prime is 1609409849. The next prime is 1609409911. The reversal of 1609409893 is 3989049061.

It is a cyclic number.

It is not a de Polignac number, because 1609409893 - 2²¹ = 1607312741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1609409803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198130 + ... + 206092.

It is an arithmetic number, because the mean of its divisors is an integer number (123872056).

Almost surely, 2^1609409893 is an apocalyptic number.

1609409893 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1609409893 is a deficient number, since it is larger than the sum of its proper divisors (372543003).

1609409893 is a wasteful number, since it uses less digits than its factorization.

1609409893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10204.

The product of its (nonzero) digits is 419904, while the sum is 49.

The square root of 1609409893 is about 40117.4512276141. The cubic root of 1609409893 is about 1171.8955061139.

The spelling of 1609409893 in words is "one billion, six hundred nine million, four hundred nine thousand, eight hundred ninety-three".