78097237 has 2 divisors, whose sum is σ = 78097238. Its totient is φ = 78097236.

The previous prime is 78097223. The next prime is 78097247. The reversal of 78097237 is 73279087.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64657681 + 13439556 = 8041^2 + 3666^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78097237 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78097193 and 78097202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78097207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39048618 + 39048619.

It is an arithmetic number, because the mean of its divisors is an integer number (39048619).

Almost surely, 2^78097237 is an apocalyptic number.

It is an amenable number.

78097237 is a deficient number, since it is larger than the sum of its proper divisors (1).

78097237 is an equidigital number, since it uses as much as digits as its factorization.

78097237 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 148176, while the sum is 43.

The square root of 78097237 is about 8837.2641128349. The cubic root of 78097237 is about 427.4433416698.

The spelling of 78097237 in words is "seventy-eight million, ninety-seven thousand, two hundred thirty-seven".