83187889 has 2 divisors, whose sum is σ = 83187890. Its totient is φ = 83187888.

The previous prime is 83187799. The next prime is 83187901. The reversal of 83187889 is 98878138.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74097664 + 9090225 = 8608^2 + 3015^2 .

It is a cyclic number.

It is not a de Polignac number, because 83187889 - 2⁷ = 83187761 is a prime.

It is not a weakly prime, because it can be changed into another prime (83187289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41593944 + 41593945.

It is an arithmetic number, because the mean of its divisors is an integer number (41593945).

Almost surely, 2^83187889 is an apocalyptic number.

It is an amenable number.

83187889 is a deficient number, since it is larger than the sum of its proper divisors (1).

83187889 is an equidigital number, since it uses as much as digits as its factorization.

83187889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 774144, while the sum is 52.

The square root of 83187889 is about 9120.7394985275. The cubic root of 83187889 is about 436.5359697299.

The spelling of 83187889 in words is "eighty-three million, one hundred eighty-seven thousand, eight hundred eighty-nine".