1997374272953 has 2 divisors, whose sum is σ = 1997374272954. Its totient is φ = 1997374272952.

The previous prime is 1997374272917. The next prime is 1997374272967. The reversal of 1997374272953 is 3592724737991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1979896639744 + 17477633209 = 1407088^2 + 132203^2 .

It is a cyclic number.

It is not a de Polignac number, because 1997374272953 - 2¹⁴ = 1997374256569 is a prime.

It is not a weakly prime, because it can be changed into another prime (1997374272973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 998687136476 + 998687136477.

It is an arithmetic number, because the mean of its divisors is an integer number (998687136477).

Almost surely, 2^{1997374272953} is an apocalyptic number.

It is an amenable number.

1997374272953 is a deficient number, since it is larger than the sum of its proper divisors (1).

1997374272953 is an equidigital number, since it uses as much as digits as its factorization.

1997374272953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 180033840, while the sum is 68.

The spelling of 1997374272953 in words is "one trillion, nine hundred ninety-seven billion, three hundred seventy-four million, two hundred seventy-two thousand, nine hundred fifty-three".