1235409997 has 2 divisors, whose sum is σ = 1235409998. Its totient is φ = 1235409996.

The previous prime is 1235409977. The next prime is 1235410013. The reversal of 1235409997 is 7999045321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1198613641 + 36796356 = 34621^2 + 6066^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1235409997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1235409997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1235409937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 617704998 + 617704999.

It is an arithmetic number, because the mean of its divisors is an integer number (617704999).

Almost surely, 2^1235409997 is an apocalyptic number.

It is an amenable number.

1235409997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1235409997 is an equidigital number, since it uses as much as digits as its factorization.

1235409997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 612360, while the sum is 49.

The square root of 1235409997 is about 35148.3996363988. The cubic root of 1235409997 is about 1073.0098378160.

The spelling of 1235409997 in words is "one billion, two hundred thirty-five million, four hundred nine thousand, nine hundred ninety-seven".