375811609 has 4 divisors (see below), whose sum is σ = 388770660. Its totient is φ = 362852560.

The previous prime is 375811603. The next prime is 375811649. The reversal of 375811609 is 906118573.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 906118573 = 41 ⋅22100453.

It can be written as a sum of positive squares in 2 ways, for example, as 78145600 + 297666009 = 8840^2 + 17253^2 .

It is a cyclic number.

It is not a de Polignac number, because 375811609 - 2¹⁵ = 375778841 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (375811603) 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, 6479482 + ... + 6479539.

It is an arithmetic number, because the mean of its divisors is an integer number (97192665).

Almost surely, 2^375811609 is an apocalyptic number.

It is an amenable number.

375811609 is a deficient number, since it is larger than the sum of its proper divisors (12959051).

375811609 is a wasteful number, since it uses less digits than its factorization.

375811609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12959050.

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 375811609 is about 19385.8610590296. The cubic root of 375811609 is about 721.6446515006.

The spelling of 375811609 in words is "three hundred seventy-five million, eight hundred eleven thousand, six hundred nine".