803427821 has 4 divisors (see below), whose sum is σ = 918203232. Its totient is φ = 688652412.

The previous prime is 803427811. The next prime is 803427827. The reversal of 803427821 is 128724308.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-803427821 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 (803427827) 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, 57387695 + ... + 57387708.

It is an arithmetic number, because the mean of its divisors is an integer number (229550808).

Almost surely, 2^803427821 is an apocalyptic number.

It is an amenable number.

803427821 is a deficient number, since it is larger than the sum of its proper divisors (114775411).

803427821 is a wasteful number, since it uses less digits than its factorization.

803427821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114775410.

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 803427821 is about 28344.8023630436. The cubic root of 803427821 is about 929.6417554938.

The spelling of 803427821 in words is "eight hundred three million, four hundred twenty-seven thousand, eight hundred twenty-one".