78522937 has 2 divisors, whose sum is σ = 78522938. Its totient is φ = 78522936.

The previous prime is 78522931. The next prime is 78522959. The reversal of 78522937 is 73922587.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72863296 + 5659641 = 8536^2 + 2379^2 .

It is a cyclic number.

It is not a de Polignac number, because 78522937 - 2⁷ = 78522809 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78522893 and 78522902.

It is not a weakly prime, because it can be changed into another prime (78522931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39261468 + 39261469.

It is an arithmetic number, because the mean of its divisors is an integer number (39261469).

Almost surely, 2^78522937 is an apocalyptic number.

It is an amenable number.

78522937 is a deficient number, since it is larger than the sum of its proper divisors (1).

78522937 is an equidigital number, since it uses as much as digits as its factorization.

78522937 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 211680, while the sum is 43.

The square root of 78522937 is about 8861.3168885894. The cubic root of 78522937 is about 428.2185846671.

The spelling of 78522937 in words is "seventy-eight million, five hundred twenty-two thousand, nine hundred thirty-seven".