78175441 has 2 divisors, whose sum is σ = 78175442. Its totient is φ = 78175440.

The previous prime is 78175439. The next prime is 78175451. The reversal of 78175441 is 14457187.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76475025 + 1700416 = 8745^2 + 1304^2 .

It is an emirp because it is prime and its reverse (14457187) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78175441 - 2¹ = 78175439 is a prime.

It is a super-2 number, since 2×78175441² = 12222799151088962, which contains 22 as substring.

Together with 78175439, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 78175441.

It is not a weakly prime, because it can be changed into another prime (78175411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39087720 + 39087721.

It is an arithmetic number, because the mean of its divisors is an integer number (39087721).

Almost surely, 2^78175441 is an apocalyptic number.

It is an amenable number.

78175441 is a deficient number, since it is larger than the sum of its proper divisors (1).

78175441 is an equidigital number, since it uses as much as digits as its factorization.

78175441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31360, while the sum is 37.

The square root of 78175441 is about 8841.6876782660. The cubic root of 78175441 is about 427.5859699657.

The spelling of 78175441 in words is "seventy-eight million, one hundred seventy-five thousand, four hundred forty-one".