848870021 has 4 divisors (see below), whose sum is σ = 871812492. Its totient is φ = 825927552.

The previous prime is 848870017. The next prime is 848870023. The reversal of 848870021 is 120078848.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 620557921 + 228312100 = 24911^2 + 15110^2 .

It is a cyclic number.

It is not a de Polignac number, because 848870021 - 2² = 848870017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (848870023) 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, 11471180 + ... + 11471253.

It is an arithmetic number, because the mean of its divisors is an integer number (217953123).

Almost surely, 2^848870021 is an apocalyptic number.

It is an amenable number.

848870021 is a deficient number, since it is larger than the sum of its proper divisors (22942471).

848870021 is a wasteful number, since it uses less digits than its factorization.

848870021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22942470.

The product of its (nonzero) digits is 28672, while the sum is 38.

The square root of 848870021 is about 29135.3740494266. The cubic root of 848870021 is about 946.8482889944.

The spelling of 848870021 in words is "eight hundred forty-eight million, eight hundred seventy thousand, twenty-one".