1397196912649 has 2 divisors, whose sum is σ = 1397196912650. Its totient is φ = 1397196912648.

The previous prime is 1397196912623. The next prime is 1397196912653. The reversal of 1397196912649 is 9462196917931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1156984199424 + 240212713225 = 1075632^2 + 490115^2 .

It is a cyclic number.

It is not a de Polignac number, because 1397196912649 - 2¹¹ = 1397196910601 is a prime.

It is not a weakly prime, because it can be changed into another prime (1397196912949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 698598456324 + 698598456325.

It is an arithmetic number, because the mean of its divisors is an integer number (698598456325).

Almost surely, 2^{1397196912649} is an apocalyptic number.

It is an amenable number.

1397196912649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1397196912649 is an equidigital number, since it uses as much as digits as its factorization.

1397196912649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 39680928, while the sum is 67.

The spelling of 1397196912649 in words is "one trillion, three hundred ninety-seven billion, one hundred ninety-six million, nine hundred twelve thousand, six hundred forty-nine".