78052417 has 2 divisors, whose sum is σ = 78052418. Its totient is φ = 78052416.

The previous prime is 78052319. The next prime is 78052433. The reversal of 78052417 is 71425087.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71503936 + 6548481 = 8456^2 + 2559^2 .

It is a cyclic number.

It is not a de Polignac number, because 78052417 - 2¹⁵ = 78019649 is a prime.

It is not a weakly prime, because it can be changed into another prime (78059417) 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, 39026208 + 39026209.

It is an arithmetic number, because the mean of its divisors is an integer number (39026209).

Almost surely, 2^78052417 is an apocalyptic number.

It is an amenable number.

78052417 is a deficient number, since it is larger than the sum of its proper divisors (1).

78052417 is an equidigital number, since it uses as much as digits as its factorization.

78052417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 78052417 is about 8834.7278962060. The cubic root of 78052417 is about 427.3615561189.

The spelling of 78052417 in words is "seventy-eight million, fifty-two thousand, four hundred seventeen".