78702413 has 2 divisors, whose sum is σ = 78702414. Its totient is φ = 78702412.

The previous prime is 78702391. The next prime is 78702419. The reversal of 78702413 is 31420787.

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., 69923044 + 8779369 = 8362^2 + 2963^2 .

It is an emirp because it is prime and its reverse (31420787) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78702413 - 2⁸ = 78702157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78702413.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78702419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39351206 + 39351207.

It is an arithmetic number, because the mean of its divisors is an integer number (39351207).

Almost surely, 2^78702413 is an apocalyptic number.

It is an amenable number.

78702413 is a deficient number, since it is larger than the sum of its proper divisors (1).

78702413 is an equidigital number, since it uses as much as digits as its factorization.

78702413 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 78702413 is about 8871.4380457736. The cubic root of 78702413 is about 428.5445891076.

The spelling of 78702413 in words is "seventy-eight million, seven hundred two thousand, four hundred thirteen".