1231790297 has 2 divisors, whose sum is σ = 1231790298. Its totient is φ = 1231790296.

The previous prime is 1231790257. The next prime is 1231790309. The reversal of 1231790297 is 7920971321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1224720016 + 7070281 = 34996^2 + 2659^2 .

It is an emirp because it is prime and its reverse (7920971321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1231790297 - 2¹² = 1231786201 is a prime.

It is not a weakly prime, because it can be changed into another prime (1231790237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615895148 + 615895149.

It is an arithmetic number, because the mean of its divisors is an integer number (615895149).

Almost surely, 2^1231790297 is an apocalyptic number.

It is an amenable number.

1231790297 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231790297 is an equidigital number, since it uses as much as digits as its factorization.

1231790297 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 47628, while the sum is 41.

The square root of 1231790297 is about 35096.8701880951. The cubic root of 1231790297 is about 1071.9608545635.

The spelling of 1231790297 in words is "one billion, two hundred thirty-one million, seven hundred ninety thousand, two hundred ninety-seven".