78722341 has 2 divisors, whose sum is σ = 78722342. Its totient is φ = 78722340.

The previous prime is 78722333. The next prime is 78722351. The reversal of 78722341 is 14322787.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73034116 + 5688225 = 8546^2 + 2385^2 .

It is an emirp because it is prime and its reverse (14322787) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78722341 - 2³ = 78722333 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78722297 and 78722306.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78722351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39361170 + 39361171.

It is an arithmetic number, because the mean of its divisors is an integer number (39361171).

Almost surely, 2^78722341 is an apocalyptic number.

It is an amenable number.

78722341 is a deficient number, since it is larger than the sum of its proper divisors (1).

78722341 is an equidigital number, since it uses as much as digits as its factorization.

78722341 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18816, while the sum is 34.

The square root of 78722341 is about 8872.5611296852. The cubic root of 78722341 is about 428.5807562150.

The spelling of 78722341 in words is "seventy-eight million, seven hundred twenty-two thousand, three hundred forty-one".