78669113 has 2 divisors, whose sum is σ = 78669114. Its totient is φ = 78669112.

The previous prime is 78669091. The next prime is 78669127. The reversal of 78669113 is 31196687.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74874409 + 3794704 = 8653^2 + 1948^2 .

It is a cyclic number.

It is not a de Polignac number, because 78669113 - 2¹⁰ = 78668089 is a prime.

It is not a weakly prime, because it can be changed into another prime (78669163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39334556 + 39334557.

It is an arithmetic number, because the mean of its divisors is an integer number (39334557).

Almost surely, 2^78669113 is an apocalyptic number.

It is an amenable number.

78669113 is a deficient number, since it is larger than the sum of its proper divisors (1).

78669113 is an equidigital number, since it uses as much as digits as its factorization.

78669113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 41.

The square root of 78669113 is about 8869.5610376162. The cubic root of 78669113 is about 428.4841396777.

The spelling of 78669113 in words is "seventy-eight million, six hundred sixty-nine thousand, one hundred thirteen".