83963921 has 2 divisors, whose sum is σ = 83963922. Its totient is φ = 83963920.

The previous prime is 83963917. The next prime is 83963947. The reversal of 83963921 is 12936938.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83923921 + 40000 = 9161^2 + 200^2 .

It is a cyclic number.

It is not a de Polignac number, because 83963921 - 2² = 83963917 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (83963021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41981960 + 41981961.

It is an arithmetic number, because the mean of its divisors is an integer number (41981961).

Almost surely, 2^83963921 is an apocalyptic number.

It is an amenable number.

83963921 is a deficient number, since it is larger than the sum of its proper divisors (1).

83963921 is an equidigital number, since it uses as much as digits as its factorization.

83963921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 41.

The square root of 83963921 is about 9163.1829077019. The cubic root of 83963921 is about 437.8892031560.

The spelling of 83963921 in words is "eighty-three million, nine hundred sixty-three thousand, nine hundred twenty-one".