82019501 has 2 divisors, whose sum is σ = 82019502. Its totient is φ = 82019500.

The previous prime is 82019477. The next prime is 82019503. The reversal of 82019501 is 10591028.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63520900 + 18498601 = 7970^2 + 4301^2 .

It is a cyclic number.

It is not a de Polignac number, because 82019501 - 2¹⁰ = 82018477 is a prime.

Together with 82019503, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82019503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41009750 + 41009751.

It is an arithmetic number, because the mean of its divisors is an integer number (41009751).

Almost surely, 2^82019501 is an apocalyptic number.

It is an amenable number.

82019501 is a deficient number, since it is larger than the sum of its proper divisors (1).

82019501 is an equidigital number, since it uses as much as digits as its factorization.

82019501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 82019501 is about 9056.4618367219. The cubic root of 82019501 is about 434.4825855761.

The spelling of 82019501 in words is "eighty-two million, nineteen thousand, five hundred one".