809252995 has 4 divisors (see below), whose sum is σ = 971103600. Its totient is φ = 647402392.

The previous prime is 809252987. The next prime is 809253013. The reversal of 809252995 is 599252908.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 809252995 - 2³ = 809252987 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80925295 + ... + 80925304.

It is an arithmetic number, because the mean of its divisors is an integer number (242775900).

Almost surely, 2^809252995 is an apocalyptic number.

809252995 is a deficient number, since it is larger than the sum of its proper divisors (161850605).

809252995 is a wasteful number, since it uses less digits than its factorization.

809252995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161850604.

The product of its (nonzero) digits is 583200, while the sum is 49.

The square root of 809252995 is about 28447.3723742633. The cubic root of 809252995 is about 931.8831058457.

The spelling of 809252995 in words is "eight hundred nine million, two hundred fifty-two thousand, nine hundred ninety-five".