729097193791 has 4 divisors (see below), whose sum is σ = 771985264032. Its totient is φ = 686209123552.

The previous prime is 729097193771. The next prime is 729097193809. The reversal of 729097193791 is 197391790927.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 197391790927 = 263 ⋅750539129.

It is a cyclic number.

It is not a de Polignac number, because 729097193791 - 2⁷ = 729097193663 is a prime.

It is a super-2 number, since 2×729097193791² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (729097193771) 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 3 ways as a sum of consecutive naturals, for example, 21444035095 + ... + 21444035128.

It is an arithmetic number, because the mean of its divisors is an integer number (192996316008).

Almost surely, 2^729097193791 is an apocalyptic number.

729097193791 is a deficient number, since it is larger than the sum of its proper divisors (42888070241).

729097193791 is a wasteful number, since it uses less digits than its factorization.

729097193791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42888070240.

The product of its (nonzero) digits is 13502538, while the sum is 64.

The spelling of 729097193791 in words is "seven hundred twenty-nine billion, ninety-seven million, one hundred ninety-three thousand, seven hundred ninety-one".