82478311 has 2 divisors, whose sum is σ = 82478312. Its totient is φ = 82478310.

The previous prime is 82478309. The next prime is 82478323. The reversal of 82478311 is 11387428.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 82478311 - 2¹ = 82478309 is a prime.

Together with 82478309, it forms a pair of twin primes.

It is equal to p_4805647 and since 82478311 and 4805647 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 (82478351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41239155 + 41239156.

It is an arithmetic number, because the mean of its divisors is an integer number (41239156).

Almost surely, 2^82478311 is an apocalyptic number.

82478311 is a deficient number, since it is larger than the sum of its proper divisors (1).

82478311 is an equidigital number, since it uses as much as digits as its factorization.

82478311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10752, while the sum is 34.

The square root of 82478311 is about 9081.7570436563. The cubic root of 82478311 is about 435.2912322898.

The spelling of 82478311 in words is "eighty-two million, four hundred seventy-eight thousand, three hundred eleven".