349118591 has 4 divisors (see below), whose sum is σ = 357237672. Its totient is φ = 340999512.

The previous prime is 349118563. The next prime is 349118593. The reversal of 349118591 is 195811943.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-349118591 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 (349118593) 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, 4059476 + ... + 4059561.

It is an arithmetic number, because the mean of its divisors is an integer number (89309418).

Almost surely, 2^349118591 is an apocalyptic number.

349118591 is a deficient number, since it is larger than the sum of its proper divisors (8119081).

349118591 is an equidigital number, since it uses as much as digits as its factorization.

349118591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8119080.

The product of its digits is 38880, while the sum is 41.

The square root of 349118591 is about 18684.7154380258. The cubic root of 349118591 is about 704.1377994881.

The spelling of 349118591 in words is "three hundred forty-nine million, one hundred eighteen thousand, five hundred ninety-one".