80633921 has 4 divisors (see below), whose sum is σ = 82600644. Its totient is φ = 78667200.

The previous prime is 80633899. The next prime is 80633923. The reversal of 80633921 is 12933608.

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 16313521 + 64320400 = 4039^2 + 8020^2 .

It is a cyclic number.

It is not a de Polignac number, because 80633921 - 2¹⁸ = 80371777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80633923) 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, 983300 + ... + 983381.

It is an arithmetic number, because the mean of its divisors is an integer number (20650161).

Almost surely, 2^80633921 is an apocalyptic number.

It is an amenable number.

80633921 is a deficient number, since it is larger than the sum of its proper divisors (1966723).

80633921 is a wasteful number, since it uses less digits than its factorization.

80633921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1966722.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 80633921 is about 8979.6392466513. The cubic root of 80633921 is about 432.0220628450.

The spelling of 80633921 in words is "eighty million, six hundred thirty-three thousand, nine hundred twenty-one".