1997374272967 has 2 divisors, whose sum is σ = 1997374272968. Its totient is φ = 1997374272966.

The previous prime is 1997374272953. The next prime is 1997374272973. The reversal of 1997374272967 is 7692724737991.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1997374272967 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1997374272967.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1997374272917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 998687136483 + 998687136484.

It is an arithmetic number, because the mean of its divisors is an integer number (998687136484).

Almost surely, 2^{1997374272967} is an apocalyptic number.

1997374272967 is a deficient number, since it is larger than the sum of its proper divisors (1).

1997374272967 is an equidigital number, since it uses as much as digits as its factorization.

1997374272967 is an evil number, because the sum of its binary digits is even.

The product of its digits is 504094752, while the sum is 73.

The spelling of 1997374272967 in words is "one trillion, nine hundred ninety-seven billion, three hundred seventy-four million, two hundred seventy-two thousand, nine hundred sixty-seven".