80199421 has 4 divisors (see below), whose sum is σ = 84917052. Its totient is φ = 75481792.

The previous prime is 80199419. The next prime is 80199433. The reversal of 80199421 is 12499108.

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 61795321 + 18404100 = 7861^2 + 4290^2 .

It is a cyclic number.

It is not a de Polignac number, because 80199421 - 2¹ = 80199419 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 (80199491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2358790 + ... + 2358823.

It is an arithmetic number, because the mean of its divisors is an integer number (21229263).

Almost surely, 2^80199421 is an apocalyptic number.

It is an amenable number.

80199421 is a deficient number, since it is larger than the sum of its proper divisors (4717631).

80199421 is a wasteful number, since it uses less digits than its factorization.

80199421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4717630.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 80199421 is about 8955.4129441361. The cubic root of 80199421 is about 431.2446738543.

The spelling of 80199421 in words is "eighty million, one hundred ninety-nine thousand, four hundred twenty-one".