291284138648941 has 4 divisors (see below), whose sum is σ = 291323043977472. Its totient is φ = 291245233320412.

The previous prime is 291284138648869. The next prime is 291284138648959. The reversal of 291284138648941 is 149846831482192.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-291284138648941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (291284138648141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19452653035 + ... + 19452668008.

It is an arithmetic number, because the mean of its divisors is an integer number (72830760994368).

Almost surely, 2^{291284138648941} is an apocalyptic number.

It is an amenable number.

291284138648941 is a deficient number, since it is larger than the sum of its proper divisors (38905328531).

291284138648941 is an equidigital number, since it uses as much as digits as its factorization.

291284138648941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38905328530.

The product of its digits is 191102976, while the sum is 70.

The spelling of 291284138648941 in words is "two hundred ninety-one trillion, two hundred eighty-four billion, one hundred thirty-eight million, six hundred forty-eight thousand, nine hundred forty-one".