1609213967 has 4 divisors (see below), whose sum is σ = 1636488840. Its totient is φ = 1581939096.

The previous prime is 1609213939. The next prime is 1609214023. The reversal of 1609213967 is 7693129061.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1609213967 is a prime.

It is a Duffinian number.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1609213927) 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, 13637348 + ... + 13637465.

It is an arithmetic number, because the mean of its divisors is an integer number (409122210).

Almost surely, 2^1609213967 is an apocalyptic number.

1609213967 is a deficient number, since it is larger than the sum of its proper divisors (27274873).

1609213967 is an equidigital number, since it uses as much as digits as its factorization.

1609213967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27274872.

The product of its (nonzero) digits is 122472, while the sum is 44.

The square root of 1609213967 is about 40115.0092484098. The cubic root of 1609213967 is about 1171.8479495286.

The spelling of 1609213967 in words is "one billion, six hundred nine million, two hundred thirteen thousand, nine hundred sixty-seven".