997825061 has 2 divisors, whose sum is σ = 997825062. Its totient is φ = 997825060.

The previous prime is 997825057. The next prime is 997825079. The reversal of 997825061 is 160528799.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 784840225 + 212984836 = 28015^2 + 14594^2 .

It is a cyclic number.

It is not a de Polignac number, because 997825061 - 2² = 997825057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 997824997 and 997825015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (997825001) 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, 498912530 + 498912531.

It is an arithmetic number, because the mean of its divisors is an integer number (498912531).

Almost surely, 2^997825061 is an apocalyptic number.

It is an amenable number.

997825061 is a deficient number, since it is larger than the sum of its proper divisors (1).

997825061 is an equidigital number, since it uses as much as digits as its factorization.

997825061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160, while the sum is 47.

The square root of 997825061 is about 31588.3690778742. The cubic root of 997825061 is about 999.2744941018.

The spelling of 997825061 in words is "nine hundred ninety-seven million, eight hundred twenty-five thousand, sixty-one".