997706953 has 2 divisors, whose sum is σ = 997706954. Its totient is φ = 997706952.

The previous prime is 997706939. The next prime is 997706989. The reversal of 997706953 is 359607799.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 606735424 + 390971529 = 24632^2 + 19773^2 .

It is a cyclic number.

It is not a de Polignac number, because 997706953 - 2¹⁷ = 997575881 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 997706894 and 997706903.

It is not a weakly prime, because it can be changed into another prime (997706993) 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, 498853476 + 498853477.

It is an arithmetic number, because the mean of its divisors is an integer number (498853477).

Almost surely, 2^997706953 is an apocalyptic number.

It is an amenable number.

997706953 is a deficient number, since it is larger than the sum of its proper divisors (1).

997706953 is an equidigital number, since it uses as much as digits as its factorization.

997706953 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3214890, while the sum is 55.

The square root of 997706953 is about 31586.4995369857. The cubic root of 997706953 is about 999.2350660252.

The spelling of 997706953 in words is "nine hundred ninety-seven million, seven hundred six thousand, nine hundred fifty-three".