78182243 has 2 divisors, whose sum is σ = 78182244. Its totient is φ = 78182242.

The previous prime is 78182149. The next prime is 78182249. The reversal of 78182243 is 34228187.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78182243 - 2¹² = 78178147 is a prime.

It is a super-2 number, since 2×78182243² = 12224926241022098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78182249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39091121 + 39091122.

It is an arithmetic number, because the mean of its divisors is an integer number (39091122).

Almost surely, 2^78182243 is an apocalyptic number.

78182243 is a deficient number, since it is larger than the sum of its proper divisors (1).

78182243 is an equidigital number, since it uses as much as digits as its factorization.

78182243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21504, while the sum is 35.

The square root of 78182243 is about 8842.0723249700. The cubic root of 78182243 is about 427.5983709422.

The spelling of 78182243 in words is "seventy-eight million, one hundred eighty-two thousand, two hundred forty-three".