82178413 has 2 divisors, whose sum is σ = 82178414. Its totient is φ = 82178412.

The previous prime is 82178359. The next prime is 82178423. The reversal of 82178413 is 31487128.

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., 47155689 + 35022724 = 6867^2 + 5918^2 .

It is a cyclic number.

It is not a de Polignac number, because 82178413 - 2¹⁷ = 82047341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82178423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41089206 + 41089207.

It is an arithmetic number, because the mean of its divisors is an integer number (41089207).

Almost surely, 2^82178413 is an apocalyptic number.

It is an amenable number.

82178413 is a deficient number, since it is larger than the sum of its proper divisors (1).

82178413 is an equidigital number, since it uses as much as digits as its factorization.

82178413 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 82178413 is about 9065.2309954022. The cubic root of 82178413 is about 434.7630065033.

The spelling of 82178413 in words is "eighty-two million, one hundred seventy-eight thousand, four hundred thirteen".