1297969543 has 8 divisors (see below), whose sum is σ = 1398950000. Its totient is φ = 1197151488.

The previous prime is 1297969537. The next prime is 1297969549. The reversal of 1297969543 is 3459697921.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1297969537) and next prime (1297969549).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1297969543 - 2⁹ = 1297969031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1297969549) 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 7 ways as a sum of consecutive naturals, for example, 23733 + ... + 56206.

It is an arithmetic number, because the mean of its divisors is an integer number (174868750).

Almost surely, 2^1297969543 is an apocalyptic number.

1297969543 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1297969543 is a deficient number, since it is larger than the sum of its proper divisors (100980457).

1297969543 is a wasteful number, since it uses less digits than its factorization.

1297969543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81201.

The product of its digits is 3674160, while the sum is 55.

The square root of 1297969543 is about 36027.3443789575. The cubic root of 1297969543 is about 1090.8243750993.

The spelling of 1297969543 in words is "one billion, two hundred ninety-seven million, nine hundred sixty-nine thousand, five hundred forty-three".