82474919 has 2 divisors, whose sum is σ = 82474920. Its totient is φ = 82474918.

The previous prime is 82474907. The next prime is 82474921. The reversal of 82474919 is 91947428.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 82474919 - 2¹² = 82470823 is a prime.

It is a super-2 number, since 2×82474919² = 13604224528113122, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 82474921, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 82474919.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82474999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41237459 + 41237460.

It is an arithmetic number, because the mean of its divisors is an integer number (41237460).

Almost surely, 2^82474919 is an apocalyptic number.

82474919 is a deficient number, since it is larger than the sum of its proper divisors (1).

82474919 is an equidigital number, since it uses as much as digits as its factorization.

82474919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 44.

The square root of 82474919 is about 9081.5702937322. The cubic root of 82474919 is about 435.2852649509.

The spelling of 82474919 in words is "eighty-two million, four hundred seventy-four thousand, nine hundred nineteen".