80621843 has 2 divisors, whose sum is σ = 80621844. Its totient is φ = 80621842.

The previous prime is 80621839. The next prime is 80621869. The reversal of 80621843 is 34812608.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 80621843 - 2² = 80621839 is a prime.

It is not a weakly prime, because it can be changed into another prime (80621813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40310921 + 40310922.

It is an arithmetic number, because the mean of its divisors is an integer number (40310922).

Almost surely, 2^80621843 is an apocalyptic number.

80621843 is a deficient number, since it is larger than the sum of its proper divisors (1).

80621843 is an equidigital number, since it uses as much as digits as its factorization.

80621843 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 80621843 is about 8978.9667000162. The cubic root of 80621843 is about 432.0004911831. Note that the first 3 decimals are identical.

The spelling of 80621843 in words is "eighty million, six hundred twenty-one thousand, eight hundred forty-three".