82978163 has 2 divisors, whose sum is σ = 82978164. Its totient is φ = 82978162.

The previous prime is 82978157. The next prime is 82978201. The reversal of 82978163 is 36187928.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 82978163 - 2⁸ = 82977907 is a prime.

It is a super-3 number, since 3×82978163³ (a number of 25 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (82978123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41489081 + 41489082.

It is an arithmetic number, because the mean of its divisors is an integer number (41489082).

Almost surely, 2^82978163 is an apocalyptic number.

82978163 is a deficient number, since it is larger than the sum of its proper divisors (1).

82978163 is an equidigital number, since it uses as much as digits as its factorization.

82978163 is an evil number, because the sum of its binary digits is even.

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

The square root of 82978163 is about 9109.2350392335. The cubic root of 82978163 is about 436.1688089559.

The spelling of 82978163 in words is "eighty-two million, nine hundred seventy-eight thousand, one hundred sixty-three".