899780865847 has 4 divisors (see below), whose sum is σ = 900330519816. Its totient is φ = 899231211880.

The previous prime is 899780865839. The next prime is 899780865883. The reversal of 899780865847 is 748568087998.

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 899780865847 - 2³ = 899780865839 is a prime.

It is a super-2 number, since 2×899780865847² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (899780865547) 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, 274824529 + ... + 274827802.

It is an arithmetic number, because the mean of its divisors is an integer number (225082629954).

Almost surely, 2^899780865847 is an apocalyptic number.

899780865847 is a deficient number, since it is larger than the sum of its proper divisors (549653969).

899780865847 is a wasteful number, since it uses less digits than its factorization.

899780865847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549653968.

The product of its (nonzero) digits is 1950842880, while the sum is 79.

The spelling of 899780865847 in words is "eight hundred ninety-nine billion, seven hundred eighty million, eight hundred sixty-five thousand, eight hundred forty-seven".