1205628997 has 2 divisors, whose sum is σ = 1205628998. Its totient is φ = 1205628996.

The previous prime is 1205628989. The next prime is 1205629003. The reversal of 1205628997 is 7998265021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 665949636 + 539679361 = 25806^2 + 23231^2 .

It is a cyclic number.

It is not a de Polignac number, because 1205628997 - 2³ = 1205628989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1205628997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1205628937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 602814498 + 602814499.

It is an arithmetic number, because the mean of its divisors is an integer number (602814499).

Almost surely, 2^1205628997 is an apocalyptic number.

It is an amenable number.

1205628997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1205628997 is an equidigital number, since it uses as much as digits as its factorization.

1205628997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 544320, while the sum is 49.

The square root of 1205628997 is about 34722.1686678698. The cubic root of 1205628997 is about 1064.3175617231.

The spelling of 1205628997 in words is "one billion, two hundred five million, six hundred twenty-eight thousand, nine hundred ninety-seven".