1291813030739 has 16 divisors (see below), whose sum is σ = 1636974917376. Its totient is φ = 990105789600.

The previous prime is 1291813030733. The next prime is 1291813030769. The reversal of 1291813030739 is 9370303181921.

It is a cyclic number.

It is not a de Polignac number, because 1291813030739 - 2³² = 1287518063443 is a prime.

It is a super-2 number, since 2×1291813030739² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1291813030693 and 1291813030702.

It is not an unprimeable number, because it can be changed into a prime (1291813030733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137509997 + ... + 137519390.

It is an arithmetic number, because the mean of its divisors is an integer number (102310932336).

Almost surely, 2^{1291813030739} is an apocalyptic number.

1291813030739 is a deficient number, since it is larger than the sum of its proper divisors (345161886637).

1291813030739 is a wasteful number, since it uses less digits than its factorization.

1291813030739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275029466.

The product of its (nonzero) digits is 244944, while the sum is 47.

The spelling of 1291813030739 in words is "one trillion, two hundred ninety-one billion, eight hundred thirteen million, thirty thousand, seven hundred thirty-nine".