78473767 has 2 divisors, whose sum is σ = 78473768. Its totient is φ = 78473766.

The previous prime is 78473749. The next prime is 78473771. The reversal of 78473767 is 76737487.

It is a strong prime.

It is an emirp because it is prime and its reverse (76737487) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78473767 - 2¹¹ = 78471719 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78473767.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78476767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39236883 + 39236884.

It is an arithmetic number, because the mean of its divisors is an integer number (39236884).

Almost surely, 2^78473767 is an apocalyptic number.

78473767 is a deficient number, since it is larger than the sum of its proper divisors (1).

78473767 is an equidigital number, since it uses as much as digits as its factorization.

78473767 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1382976, while the sum is 49.

The square root of 78473767 is about 8858.5420357980. The cubic root of 78473767 is about 428.1291844442.

The spelling of 78473767 in words is "seventy-eight million, four hundred seventy-three thousand, seven hundred sixty-seven".