83553889 has 2 divisors, whose sum is σ = 83553890. Its totient is φ = 83553888.

The previous prime is 83553817. The next prime is 83553893. The reversal of 83553889 is 98835538.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82901025 + 652864 = 9105^2 + 808^2 .

It is a cyclic number.

It is not a de Polignac number, because 83553889 - 2⁹ = 83553377 is a prime.

It is not a weakly prime, because it can be changed into another prime (83553809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41776944 + 41776945.

It is an arithmetic number, because the mean of its divisors is an integer number (41776945).

Almost surely, 2^83553889 is an apocalyptic number.

It is an amenable number.

83553889 is a deficient number, since it is larger than the sum of its proper divisors (1).

83553889 is an equidigital number, since it uses as much as digits as its factorization.

83553889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1036800, while the sum is 49.

The square root of 83553889 is about 9140.7816405382. The cubic root of 83553889 is about 437.1752391495.

The spelling of 83553889 in words is "eighty-three million, five hundred fifty-three thousand, eight hundred eighty-nine".