1290669973 has 2 divisors, whose sum is σ = 1290669974. Its totient is φ = 1290669972.

The previous prime is 1290669967. The next prime is 1290670061. The reversal of 1290669973 is 3799660921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1251956689 + 38713284 = 35383^2 + 6222^2 .

It is a cyclic number.

It is not a de Polignac number, because 1290669973 - 2²⁹ = 753799061 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1290669973.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1290669923) 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, 645334986 + 645334987.

It is an arithmetic number, because the mean of its divisors is an integer number (645334987).

Almost surely, 2^1290669973 is an apocalyptic number.

It is an amenable number.

1290669973 is a deficient number, since it is larger than the sum of its proper divisors (1).

1290669973 is an equidigital number, since it uses as much as digits as its factorization.

1290669973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1102248, while the sum is 52.

The square root of 1290669973 is about 35925.8955768677. The cubic root of 1290669973 is about 1088.7756566650.

The spelling of 1290669973 in words is "one billion, two hundred ninety million, six hundred sixty-nine thousand, nine hundred seventy-three".