291105420697 has 96 divisors (see below), whose sum is σ = 378310732800. Its totient is φ = 221931021312.

The previous prime is 291105420691. The next prime is 291105420703. The reversal of 291105420697 is 796024501192.

It is an interprime number because it is at equal distance from previous prime (291105420691) and next prime (291105420703).

It is a de Polignac number, because none of the positive numbers 2^k-291105420697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (291105420691) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 400419748 + ... + 400420474.

It is an arithmetic number, because the mean of its divisors is an integer number (3940736800).

Almost surely, 2^291105420697 is an apocalyptic number.

It is an amenable number.

291105420697 is a deficient number, since it is larger than the sum of its proper divisors (87205312103).

291105420697 is a wasteful number, since it uses less digits than its factorization.

291105420697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1015 (or 1008 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 46.

The spelling of 291105420697 in words is "two hundred ninety-one billion, one hundred five million, four hundred twenty thousand, six hundred ninety-seven".