1210320997 has 2 divisors, whose sum is σ = 1210320998. Its totient is φ = 1210320996.

The previous prime is 1210320983. The next prime is 1210321037. The reversal of 1210320997 is 7990230121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 852581601 + 357739396 = 29199^2 + 18914^2 .

It is an emirp because it is prime and its reverse (7990230121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1210320997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1210320497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605160498 + 605160499.

It is an arithmetic number, because the mean of its divisors is an integer number (605160499).

Almost surely, 2^1210320997 is an apocalyptic number.

It is an amenable number.

1210320997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210320997 is an equidigital number, since it uses as much as digits as its factorization.

1210320997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 1210320997 is about 34789.6679633480. The cubic root of 1210320997 is about 1065.6964584961.

The spelling of 1210320997 in words is "one billion, two hundred ten million, three hundred twenty thousand, nine hundred ninety-seven".