78032447 has 2 divisors, whose sum is σ = 78032448. Its totient is φ = 78032446.

The previous prime is 78032443. The next prime is 78032459. The reversal of 78032447 is 74423087.

It is a weak prime.

It is an emirp because it is prime and its reverse (74423087) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78032447 - 2² = 78032443 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78032443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39016223 + 39016224.

It is an arithmetic number, because the mean of its divisors is an integer number (39016224).

Almost surely, 2^78032447 is an apocalyptic number.

78032447 is a deficient number, since it is larger than the sum of its proper divisors (1).

78032447 is an equidigital number, since it uses as much as digits as its factorization.

78032447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37632, while the sum is 35.

The square root of 78032447 is about 8833.5976249770. The cubic root of 78032447 is about 427.3251056643.

The spelling of 78032447 in words is "seventy-eight million, thirty-two thousand, four hundred forty-seven".