65990347 has 2 divisors, whose sum is σ = 65990348. Its totient is φ = 65990346.

The previous prime is 65990317. The next prime is 65990357. The reversal of 65990347 is 74309956.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65990347 is a prime.

It is not a weakly prime, because it can be changed into another prime (65990317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32995173 + 32995174.

It is an arithmetic number, because the mean of its divisors is an integer number (32995174).

Almost surely, 2^65990347 is an apocalyptic number.

65990347 is a deficient number, since it is larger than the sum of its proper divisors (1).

65990347 is an equidigital number, since it uses as much as digits as its factorization.

65990347 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 204120, while the sum is 43.

The square root of 65990347 is about 8123.4442818302. Note that the first 3 decimals coincide. The cubic root of 65990347 is about 404.1042990360.

The spelling of 65990347 in words is "sixty-five million, nine hundred ninety thousand, three hundred forty-seven".