78970249 has 2 divisors, whose sum is σ = 78970250. Its totient is φ = 78970248.

The previous prime is 78970211. The next prime is 78970271. The reversal of 78970249 is 94207987.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72795024 + 6175225 = 8532^2 + 2485^2 .

It is a cyclic number.

It is not a de Polignac number, because 78970249 - 2⁷ = 78970121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78970199 and 78970208.

It is not a weakly prime, because it can be changed into another prime (78970649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39485124 + 39485125.

It is an arithmetic number, because the mean of its divisors is an integer number (39485125).

Almost surely, 2^78970249 is an apocalyptic number.

It is an amenable number.

78970249 is a deficient number, since it is larger than the sum of its proper divisors (1).

78970249 is an equidigital number, since it uses as much as digits as its factorization.

78970249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 254016, while the sum is 46.

The square root of 78970249 is about 8886.5206352093. The cubic root of 78970249 is about 429.0301723136.

The spelling of 78970249 in words is "seventy-eight million, nine hundred seventy thousand, two hundred forty-nine".