80650821 has 16 divisors (see below), whose sum is σ = 109166400. Its totient is φ = 52956288.

The previous prime is 80650807. The next prime is 80650831. The reversal of 80650821 is 12805608.

It is not a de Polignac number, because 80650821 - 2⁷ = 80650693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80650831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100795 + ... + 101591.

It is an arithmetic number, because the mean of its divisors is an integer number (6822900).

Almost surely, 2^80650821 is an apocalyptic number.

It is an amenable number.

80650821 is a deficient number, since it is larger than the sum of its proper divisors (28515579).

80650821 is a wasteful number, since it uses less digits than its factorization.

80650821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1268.

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 80650821 is about 8980.5802151086. The cubic root of 80650821 is about 432.0522431245.

The spelling of 80650821 in words is "eighty million, six hundred fifty thousand, eight hundred twenty-one".