1379743218729 has 12 divisors (see below), whose sum is σ = 1993352276916. Its totient is φ = 919648881792.

The previous prime is 1379743218727. The next prime is 1379743218739. The reversal of 1379743218729 is 9278123479731.

1379743218729 is a `hidden beast` number, since 1 + 37 + 97 + 432 + 1 + 87 + 2 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 450842416704 + 928900802025 = 671448^2 + 963795^2 .

It is not a de Polignac number, because 1379743218729 - 2¹ = 1379743218727 is a prime.

It is a super-2 number, since 2×1379743218729² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1379743218727) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14945652 + ... + 15037685.

It is an arithmetic number, because the mean of its divisors is an integer number (166112689743).

Almost surely, 2^{1379743218729} is an apocalyptic number.

It is an amenable number.

1379743218729 is a deficient number, since it is larger than the sum of its proper divisors (613609058187).

1379743218729 is a wasteful number, since it uses less digits than its factorization.

1379743218729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29988456 (or 29988453 counting only the distinct ones).

The product of its digits is 32006016, while the sum is 63.

The spelling of 1379743218729 in words is "one trillion, three hundred seventy-nine billion, seven hundred forty-three million, two hundred eighteen thousand, seven hundred twenty-nine".