1297689053 has 4 divisors (see below), whose sum is σ = 1297762428. Its totient is φ = 1297615680.

The previous prime is 1297688993. The next prime is 1297689061. The reversal of 1297689053 is 3509867921.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1181846884 + 115842169 = 34378^2 + 10763^2 .

It is a cyclic number.

It is not a de Polignac number, because 1297689053 - 2¹⁴ = 1297672669 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1297688992 and 1297689010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1297689353) 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 in 3 ways as a sum of consecutive naturals, for example, 7925 + ... + 51557.

It is an arithmetic number, because the mean of its divisors is an integer number (324440607).

Almost surely, 2^1297689053 is an apocalyptic number.

It is an amenable number.

1297689053 is a deficient number, since it is larger than the sum of its proper divisors (73375).

1297689053 is an equidigital number, since it uses as much as digits as its factorization.

1297689053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73374.

The product of its (nonzero) digits is 816480, while the sum is 50.

The square root of 1297689053 is about 36023.4514309776. The cubic root of 1297689053 is about 1090.7457940640.

The spelling of 1297689053 in words is "one billion, two hundred ninety-seven million, six hundred eighty-nine thousand, fifty-three".