78816007 has 2 divisors, whose sum is σ = 78816008. Its totient is φ = 78816006.

The previous prime is 78815999. The next prime is 78816037. The reversal of 78816007 is 70061887.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78816007 - 2³ = 78815999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78816037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39408003 + 39408004.

It is an arithmetic number, because the mean of its divisors is an integer number (39408004).

Almost surely, 2^78816007 is an apocalyptic number.

78816007 is a deficient number, since it is larger than the sum of its proper divisors (1).

78816007 is an equidigital number, since it uses as much as digits as its factorization.

78816007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18816, while the sum is 37.

The square root of 78816007 is about 8877.8379687850. The cubic root of 78816007 is about 428.7506678896.

The spelling of 78816007 in words is "seventy-eight million, eight hundred sixteen thousand, seven".