997695653 has 2 divisors, whose sum is σ = 997695654. Its totient is φ = 997695652.

The previous prime is 997695641. The next prime is 997695667. The reversal of 997695653 is 356596799.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 997485889 + 209764 = 31583^2 + 458^2 .

It is a cyclic number.

It is not a de Polignac number, because 997695653 - 2⁴ = 997695637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 997695592 and 997695601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (997695623) 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, 498847826 + 498847827.

It is an arithmetic number, because the mean of its divisors is an integer number (498847827).

Almost surely, 2^997695653 is an apocalyptic number.

It is an amenable number.

997695653 is a deficient number, since it is larger than the sum of its proper divisors (1).

997695653 is an equidigital number, since it uses as much as digits as its factorization.

997695653 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13778100, while the sum is 59.

The square root of 997695653 is about 31586.3206625906. The cubic root of 997695653 is about 999.2312935752.

The spelling of 997695653 in words is "nine hundred ninety-seven million, six hundred ninety-five thousand, six hundred fifty-three".