1609374401 has 4 divisors (see below), whose sum is σ = 1664870100. Its totient is φ = 1553878704.

The previous prime is 1609374341. The next prime is 1609374409. The reversal of 1609374401 is 1044739061.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1163151025 + 446223376 = 34105^2 + 21124^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1609374401 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1609374409) 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, 27747806 + ... + 27747863.

It is an arithmetic number, because the mean of its divisors is an integer number (416217525).

Almost surely, 2^1609374401 is an apocalyptic number.

It is an amenable number.

1609374401 is a deficient number, since it is larger than the sum of its proper divisors (55495699).

1609374401 is an equidigital number, since it uses as much as digits as its factorization.

1609374401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55495698.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 1609374401 is about 40117.0088740424. The cubic root of 1609374401 is about 1171.8868915235.

The spelling of 1609374401 in words is "one billion, six hundred nine million, three hundred seventy-four thousand, four hundred one".