1349678689969 has 2 divisors, whose sum is σ = 1349678689970. Its totient is φ = 1349678689968.

The previous prime is 1349678689889. The next prime is 1349678689991. The reversal of 1349678689969 is 9699868769431.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 858541230625 + 491137459344 = 926575^2 + 700812^2 .

It is a cyclic number.

It is not a de Polignac number, because 1349678689969 - 2¹³ = 1349678681777 is a prime.

It is a super-2 number, since 2×1349678689969² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1349678686969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 674839344984 + 674839344985.

It is an arithmetic number, because the mean of its divisors is an integer number (674839344985).

Almost surely, 2^{1349678689969} is an apocalyptic number.

It is an amenable number.

1349678689969 is a deficient number, since it is larger than the sum of its proper divisors (1).

1349678689969 is an equidigital number, since it uses as much as digits as its factorization.

1349678689969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7618738176, while the sum is 85.

The spelling of 1349678689969 in words is "one trillion, three hundred forty-nine billion, six hundred seventy-eight million, six hundred eighty-nine thousand, nine hundred sixty-nine".