68087137 has 2 divisors, whose sum is σ = 68087138. Its totient is φ = 68087136.

The previous prime is 68087111. The next prime is 68087147. The reversal of 68087137 is 73178086.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67914081 + 173056 = 8241^2 + 416^2 .

It is a cyclic number.

It is not a de Polignac number, because 68087137 - 2¹⁹ = 67562849 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68087137.

It is not a weakly prime, because it can be changed into another prime (68087147) 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, 34043568 + 34043569.

It is an arithmetic number, because the mean of its divisors is an integer number (34043569).

Almost surely, 2^68087137 is an apocalyptic number.

It is an amenable number.

68087137 is a deficient number, since it is larger than the sum of its proper divisors (1).

68087137 is an equidigital number, since it uses as much as digits as its factorization.

68087137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 68087137 is about 8251.4930164183. The cubic root of 68087137 is about 408.3397804711.

The spelling of 68087137 in words is "sixty-eight million, eighty-seven thousand, one hundred thirty-seven".