1189920412969 has 2 divisors, whose sum is σ = 1189920412970. Its totient is φ = 1189920412968.

The previous prime is 1189920412937. The next prime is 1189920413023. The reversal of 1189920412969 is 9692140299811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1186443777600 + 3476635369 = 1089240^2 + 58963^2 .

It is a cyclic number.

It is not a de Polignac number, because 1189920412969 - 2⁵ = 1189920412937 is a prime.

It is a super-2 number, since 2×1189920412969² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1189920412909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 594960206484 + 594960206485.

It is an arithmetic number, because the mean of its divisors is an integer number (594960206485).

Almost surely, 2^{1189920412969} is an apocalyptic number.

It is an amenable number.

1189920412969 is a deficient number, since it is larger than the sum of its proper divisors (1).

1189920412969 is an equidigital number, since it uses as much as digits as its factorization.

1189920412969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5038848, while the sum is 61.

The spelling of 1189920412969 in words is "one trillion, one hundred eighty-nine billion, nine hundred twenty million, four hundred twelve thousand, nine hundred sixty-nine".