1609743125 has 10 divisors (see below), whose sum is σ = 2011535790. Its totient is φ = 1287794000.

The previous prime is 1609743101. The next prime is 1609743143. The reversal of 1609743125 is 5213479061.

It can be written as a sum of positive squares in 5 ways, for example, as 405861316 + 1203881809 = 20146^2 + 34697^2 .

It is not a de Polignac number, because 1609743125 - 2¹⁸ = 1609480981 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1287170 + ... + 1288419.

It is an arithmetic number, because the mean of its divisors is an integer number (201153579).

Almost surely, 2^1609743125 is an apocalyptic number.

It is an amenable number.

1609743125 is a deficient number, since it is larger than the sum of its proper divisors (401792665).

1609743125 is an frugal number, since it uses more digits than its factorization.

1609743125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2575609 (or 2575594 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 1609743125 is about 40121.6042176780. The cubic root of 1609743125 is about 1171.9763817475.

The spelling of 1609743125 in words is "one billion, six hundred nine million, seven hundred forty-three thousand, one hundred twenty-five".