80609021 has 4 divisors (see below), whose sum is σ = 83209344. Its totient is φ = 78008700.

The previous prime is 80609017. The next prime is 80609027. The reversal of 80609021 is 12090608.

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 cyclic number.

It is not a de Polignac number, because 80609021 - 2² = 80609017 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 (80609027) 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, 1300115 + ... + 1300176.

It is an arithmetic number, because the mean of its divisors is an integer number (20802336).

Almost surely, 2^80609021 is an apocalyptic number.

It is an amenable number.

80609021 is a deficient number, since it is larger than the sum of its proper divisors (2600323).

80609021 is a wasteful number, since it uses less digits than its factorization.

80609021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2600322.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 80609021 is about 8978.2526696457. The cubic root of 80609021 is about 431.9775883578.

Adding to 80609021 its reverse (12090608), we get a palindrome (92699629).

The spelling of 80609021 in words is "eighty million, six hundred nine thousand, twenty-one".