984161257 has 2 divisors, whose sum is σ = 984161258. Its totient is φ = 984161256.

The previous prime is 984161209. The next prime is 984161281. The reversal of 984161257 is 752161489.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 702727081 + 281434176 = 26509^2 + 16776^2 .

It is an emirp because it is prime and its reverse (752161489) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 984161257 - 2¹⁵ = 984128489 is a prime.

It is not a weakly prime, because it can be changed into another prime (984161287) 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, 492080628 + 492080629.

It is an arithmetic number, because the mean of its divisors is an integer number (492080629).

Almost surely, 2^984161257 is an apocalyptic number.

It is an amenable number.

984161257 is a deficient number, since it is larger than the sum of its proper divisors (1).

984161257 is an equidigital number, since it uses as much as digits as its factorization.

984161257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 43.

The square root of 984161257 is about 31371.3445201190. The cubic root of 984161257 is about 994.6922971326.

The spelling of 984161257 in words is "nine hundred eighty-four million, one hundred sixty-one thousand, two hundred fifty-seven".