809802345 has 32 divisors (see below), whose sum is σ = 1427497344. Its totient is φ = 388736000.

The previous prime is 809802319. The next prime is 809802347. The reversal of 809802345 is 543208908.

It is a happy number.

It is not a de Polignac number, because 809802345 - 2¹⁷ = 809671273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (809802347) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7632 + ... + 40961.

It is an arithmetic number, because the mean of its divisors is an integer number (44609292).

Almost surely, 2^809802345 is an apocalyptic number.

It is an amenable number.

809802345 is a deficient number, since it is larger than the sum of its proper divisors (617694999).

809802345 is a wasteful number, since it uses less digits than its factorization.

809802345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48713.

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 809802345 is about 28457.0262852604. The cubic root of 809802345 is about 932.0939233907.

The spelling of 809802345 in words is "eight hundred nine million, eight hundred two thousand, three hundred forty-five".