291240385423 has 8 divisors (see below), whose sum is σ = 313717159616. Its totient is φ = 268774135200.

The previous prime is 291240385411. The next prime is 291240385439. The reversal of 291240385423 is 324583042192.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 291240385423 - 2²⁵ = 291206830991 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 291240385423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (291240389423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2573463 + ... + 2684248.

It is an arithmetic number, because the mean of its divisors is an integer number (39214644952).

Almost surely, 2^291240385423 is an apocalyptic number.

291240385423 is a deficient number, since it is larger than the sum of its proper divisors (22476774193).

291240385423 is a wasteful number, since it uses less digits than its factorization.

291240385423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5261985.

The product of its (nonzero) digits is 414720, while the sum is 43.

The spelling of 291240385423 in words is "two hundred ninety-one billion, two hundred forty million, three hundred eighty-five thousand, four hundred twenty-three".