800032421 has 2 divisors, whose sum is σ = 800032422. Its totient is φ = 800032420.

The previous prime is 800032417. The next prime is 800032439. The reversal of 800032421 is 124230008.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 481802500 + 318229921 = 21950^2 + 17839^2 .

It is a cyclic number.

It is not a de Polignac number, because 800032421 - 2² = 800032417 is a prime.

It is a super-2 number, since 2×800032421² = 1280103749302242482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 800032393 and 800032402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (800032021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400016210 + 400016211.

It is an arithmetic number, because the mean of its divisors is an integer number (400016211).

Almost surely, 2^800032421 is an apocalyptic number.

It is an amenable number.

800032421 is a deficient number, since it is larger than the sum of its proper divisors (1).

800032421 is an equidigital number, since it uses as much as digits as its factorization.

800032421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 800032421 is about 28284.8443693792. The cubic root of 800032421 is about 928.3303069658.

Adding to 800032421 its reverse (124230008), we get a palindrome (924262429).

The spelling of 800032421 in words is "eight hundred million, thirty-two thousand, four hundred twenty-one".