78314441 has 2 divisors, whose sum is σ = 78314442. Its totient is φ = 78314440.

The previous prime is 78314389. The next prime is 78314501. The reversal of 78314441 is 14441387.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52345225 + 25969216 = 7235^2 + 5096^2 .

It is a cyclic number.

It is not a de Polignac number, because 78314441 - 2⁶ = 78314377 is a prime.

It is a super-2 number, since 2×78314441² = 12266303338284962, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 78314398 and 78314407.

It is not a weakly prime, because it can be changed into another prime (78314641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39157220 + 39157221.

It is an arithmetic number, because the mean of its divisors is an integer number (39157221).

Almost surely, 2^78314441 is an apocalyptic number.

It is an amenable number.

78314441 is a deficient number, since it is larger than the sum of its proper divisors (1).

78314441 is an equidigital number, since it uses as much as digits as its factorization.

78314441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10752, while the sum is 32.

The square root of 78314441 is about 8849.5446775526. The cubic root of 78314441 is about 427.8392432783.

The spelling of 78314441 in words is "seventy-eight million, three hundred fourteen thousand, four hundred forty-one".