84638833 has 2 divisors, whose sum is σ = 84638834. Its totient is φ = 84638832.

The previous prime is 84638831. The next prime is 84638837. The reversal of 84638833 is 33883648.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82864609 + 1774224 = 9103^2 + 1332^2 .

It is a cyclic number.

It is not a de Polignac number, because 84638833 - 2¹ = 84638831 is a prime.

Together with 84638831, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 84638833.

It is not a weakly prime, because it can be changed into another prime (84638831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42319416 + 42319417.

It is an arithmetic number, because the mean of its divisors is an integer number (42319417).

Almost surely, 2^84638833 is an apocalyptic number.

It is an amenable number.

84638833 is a deficient number, since it is larger than the sum of its proper divisors (1).

84638833 is an equidigital number, since it uses as much as digits as its factorization.

84638833 is an evil number, because the sum of its binary digits is even.

The product of its digits is 331776, while the sum is 43.

The square root of 84638833 is about 9199.9365758683. The cubic root of 84638833 is about 439.0593420229.

The spelling of 84638833 in words is "eighty-four million, six hundred thirty-eight thousand, eight hundred thirty-three".