349345987 has 8 divisors (see below), whose sum is σ = 351814320. Its totient is φ = 346886400.

The previous prime is 349345961. The next prime is 349345999. The reversal of 349345987 is 789543943.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-349345987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (349345187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91564 + ... + 95302.

It is an arithmetic number, because the mean of its divisors is an integer number (43976790).

Almost surely, 2^349345987 is an apocalyptic number.

349345987 is a deficient number, since it is larger than the sum of its proper divisors (2468333).

349345987 is a wasteful number, since it uses less digits than its factorization.

349345987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4373.

The product of its digits is 3265920, while the sum is 52.

The square root of 349345987 is about 18690.7995281101. The cubic root of 349345987 is about 704.2906447502.

The spelling of 349345987 in words is "three hundred forty-nine million, three hundred forty-five thousand, nine hundred eighty-seven".