809375 has 24 divisors (see below), whose sum is σ = 1187424. Its totient is φ = 540000.

The previous prime is 809359. The next prime is 809377. The reversal of 809375 is 573908.

It is not a de Polignac number, because 809375 - 2⁴ = 809359 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (809377) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21857 + ... + 21893.

It is an arithmetic number, because the mean of its divisors is an integer number (49476).

2⁸⁰⁹³⁷⁵ is an apocalyptic number.

809375 is a deficient number, since it is larger than the sum of its proper divisors (378049).

809375 is an frugal number, since it uses more digits than its factorization.

809375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69 (or 49 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 809375 is about 899.6527107723. The cubic root of 809375 is about 93.1929934500.

The spelling of 809375 in words is "eight hundred nine thousand, three hundred seventy-five".