83819149 has 2 divisors, whose sum is σ = 83819150. Its totient is φ = 83819148.

The previous prime is 83819123. The next prime is 83819161. The reversal of 83819149 is 94191838.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51408900 + 32410249 = 7170^2 + 5693^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83819149 is a prime.

It is equal to p_4879096 and since 83819149 and 4879096 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83819119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41909574 + 41909575.

It is an arithmetic number, because the mean of its divisors is an integer number (41909575).

Almost surely, 2^83819149 is an apocalyptic number.

It is an amenable number.

83819149 is a deficient number, since it is larger than the sum of its proper divisors (1).

83819149 is an equidigital number, since it uses as much as digits as its factorization.

83819149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 43.

The square root of 83819149 is about 9155.2798428011. The cubic root of 83819149 is about 437.6373864036.

The spelling of 83819149 in words is "eighty-three million, eight hundred nineteen thousand, one hundred forty-nine".