78906337 has 2 divisors, whose sum is σ = 78906338. Its totient is φ = 78906336.

The previous prime is 78906329. The next prime is 78906349. The reversal of 78906337 is 73360987.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78836641 + 69696 = 8879^2 + 264^2 .

It is a cyclic number.

It is not a de Polignac number, because 78906337 - 2³ = 78906329 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78906293 and 78906302.

It is not a weakly prime, because it can be changed into another prime (78906437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39453168 + 39453169.

It is an arithmetic number, because the mean of its divisors is an integer number (39453169).

Almost surely, 2^78906337 is an apocalyptic number.

It is an amenable number.

78906337 is a deficient number, since it is larger than the sum of its proper divisors (1).

78906337 is an equidigital number, since it uses as much as digits as its factorization.

78906337 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 190512, while the sum is 43.

The square root of 78906337 is about 8882.9238992575. The cubic root of 78906337 is about 428.9144005420.

The spelling of 78906337 in words is "seventy-eight million, nine hundred six thousand, three hundred thirty-seven".