361997947 has 2 divisors, whose sum is σ = 361997948. Its totient is φ = 361997946.

The previous prime is 361997917. The next prime is 361997957. The reversal of 361997947 is 749799163.

It is a strong prime.

It is an emirp because it is prime and its reverse (749799163) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-361997947 is a prime.

It is not a weakly prime, because it can be changed into another prime (361997917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180998973 + 180998974.

It is an arithmetic number, because the mean of its divisors is an integer number (180998974).

Almost surely, 2^361997947 is an apocalyptic number.

361997947 is a deficient number, since it is larger than the sum of its proper divisors (1).

361997947 is an equidigital number, since it uses as much as digits as its factorization.

361997947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2571912, while the sum is 55.

The square root of 361997947 is about 19026.2436387218. The cubic root of 361997947 is about 712.6922494248.

The spelling of 361997947 in words is "three hundred sixty-one million, nine hundred ninety-seven thousand, nine hundred forty-seven".