1299469673 has 2 divisors, whose sum is σ = 1299469674. Its totient is φ = 1299469672.

The previous prime is 1299469667. The next prime is 1299469693. The reversal of 1299469673 is 3769649921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1173199504 + 126270169 = 34252^2 + 11237^2 .

It is a cyclic number.

It is not a de Polignac number, because 1299469673 - 2¹⁰ = 1299468649 is a prime.

It is not a weakly prime, because it can be changed into another prime (1299469693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 649734836 + 649734837.

It is an arithmetic number, because the mean of its divisors is an integer number (649734837).

Almost surely, 2^1299469673 is an apocalyptic number.

It is an amenable number.

1299469673 is a deficient number, since it is larger than the sum of its proper divisors (1).

1299469673 is an equidigital number, since it uses as much as digits as its factorization.

1299469673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4408992, while the sum is 56.

The square root of 1299469673 is about 36048.1576921762. The cubic root of 1299469673 is about 1091.2444538722.

The spelling of 1299469673 in words is "one billion, two hundred ninety-nine million, four hundred sixty-nine thousand, six hundred seventy-three".