83174561 has 2 divisors, whose sum is σ = 83174562. Its totient is φ = 83174560.

The previous prime is 83174551. The next prime is 83174563. The reversal of 83174561 is 16547138.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81793936 + 1380625 = 9044^2 + 1175^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83174561 is a prime.

Together with 83174563, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (83174563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41587280 + 41587281.

It is an arithmetic number, because the mean of its divisors is an integer number (41587281).

Almost surely, 2^83174561 is an apocalyptic number.

It is an amenable number.

83174561 is a deficient number, since it is larger than the sum of its proper divisors (1).

83174561 is an equidigital number, since it uses as much as digits as its factorization.

83174561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 35.

The square root of 83174561 is about 9120.0088267501. The cubic root of 83174561 is about 436.5126551897.

The spelling of 83174561 in words is "eighty-three million, one hundred seventy-four thousand, five hundred sixty-one".