1297935723667 has 4 divisors (see below), whose sum is σ = 1415929880376. Its totient is φ = 1179941566960.

The previous prime is 1297935723599. The next prime is 1297935723683. The reversal of 1297935723667 is 7663275397921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1297935723667 is a prime.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1297935723167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58997078338 + ... + 58997078359.

It is an arithmetic number, because the mean of its divisors is an integer number (353982470094).

Almost surely, 2^{1297935723667} is an apocalyptic number.

1297935723667 is a deficient number, since it is larger than the sum of its proper divisors (117994156709).

1297935723667 is a wasteful number, since it uses less digits than its factorization.

1297935723667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117994156708.

The product of its digits is 180033840, while the sum is 67.

The spelling of 1297935723667 in words is "one trillion, two hundred ninety-seven billion, nine hundred thirty-five million, seven hundred twenty-three thousand, six hundred sixty-seven".