347271991691 has 4 divisors (see below), whose sum is σ = 347406024384. Its totient is φ = 347137959000.

The previous prime is 347271991639. The next prime is 347271991709. The reversal of 347271991691 is 196199172743.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 347271991691 - 2¹⁸ = 347271729547 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 347271991691.

It is not an unprimeable number, because it can be changed into a prime (347271991291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67012460 + ... + 67017641.

It is an arithmetic number, because the mean of its divisors is an integer number (86851506096).

Almost surely, 2^347271991691 is an apocalyptic number.

347271991691 is a deficient number, since it is larger than the sum of its proper divisors (134032693).

347271991691 is a wasteful number, since it uses less digits than its factorization.

347271991691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134032692.

The product of its digits is 5143824, while the sum is 59.

The spelling of 347271991691 in words is "three hundred forty-seven billion, two hundred seventy-one million, nine hundred ninety-one thousand, six hundred ninety-one".