1297684439 has 8 divisors (see below), whose sum is σ = 1369104000. Its totient is φ = 1226576952.

The previous prime is 1297684433. The next prime is 1297684447. The reversal of 1297684439 is 9344867921.

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

It is a cyclic number.

It is not a de Polignac number, because 1297684439 - 2⁸ = 1297684183 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 (1297684433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69449 + ... + 86130.

It is an arithmetic number, because the mean of its divisors is an integer number (171138000).

Almost surely, 2^1297684439 is an apocalyptic number.

1297684439 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1297684439 is a deficient number, since it is larger than the sum of its proper divisors (71419561).

1297684439 is a wasteful number, since it uses less digits than its factorization.

1297684439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156037.

The product of its digits is 2612736, while the sum is 53.

The square root of 1297684439 is about 36023.3873893059. The cubic root of 1297684439 is about 1090.7445013283.

The spelling of 1297684439 in words is "one billion, two hundred ninety-seven million, six hundred eighty-four thousand, four hundred thirty-nine".