78954247 has 2 divisors, whose sum is σ = 78954248. Its totient is φ = 78954246.

The previous prime is 78954223. The next prime is 78954287. The reversal of 78954247 is 74245987.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78954247 - 2⁷ = 78954119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78954197 and 78954206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78954287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39477123 + 39477124.

It is an arithmetic number, because the mean of its divisors is an integer number (39477124).

Almost surely, 2^78954247 is an apocalyptic number.

78954247 is a deficient number, since it is larger than the sum of its proper divisors (1).

78954247 is an equidigital number, since it uses as much as digits as its factorization.

78954247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 564480, while the sum is 46.

The square root of 78954247 is about 8885.6202372147. The cubic root of 78954247 is about 429.0011917601.

The spelling of 78954247 in words is "seventy-eight million, nine hundred fifty-four thousand, two hundred forty-seven".