83583991 has 2 divisors, whose sum is σ = 83583992. Its totient is φ = 83583990.

The previous prime is 83583979. The next prime is 83584009. The reversal of 83583991 is 19938538.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 83583991 - 2¹¹ = 83581943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83583901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41791995 + 41791996.

It is an arithmetic number, because the mean of its divisors is an integer number (41791996).

Almost surely, 2^83583991 is an apocalyptic number.

83583991 is a deficient number, since it is larger than the sum of its proper divisors (1).

83583991 is an equidigital number, since it uses as much as digits as its factorization.

83583991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 46.

The square root of 83583991 is about 9142.4280691729. The cubic root of 83583991 is about 437.2277332909.

The spelling of 83583991 in words is "eighty-three million, five hundred eighty-three thousand, nine hundred ninety-one".