1209742011497 has 2 divisors, whose sum is σ = 1209742011498. Its totient is φ = 1209742011496.

The previous prime is 1209742011419. The next prime is 1209742011523. The reversal of 1209742011497 is 7941102479021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 911253523216 + 298488488281 = 954596^2 + 546341^2 .

It is a cyclic number.

It is not a de Polignac number, because 1209742011497 - 2¹⁴ = 1209741995113 is a prime.

It is not a weakly prime, because it can be changed into another prime (1209742010497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 604871005748 + 604871005749.

It is an arithmetic number, because the mean of its divisors is an integer number (604871005749).

Almost surely, 2^{1209742011497} is an apocalyptic number.

It is an amenable number.

1209742011497 is a deficient number, since it is larger than the sum of its proper divisors (1).

1209742011497 is an equidigital number, since it uses as much as digits as its factorization.

1209742011497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 254016, while the sum is 47.

The spelling of 1209742011497 in words is "one trillion, two hundred nine billion, seven hundred forty-two million, eleven thousand, four hundred ninety-seven".