347128949 has 4 divisors (see below), whose sum is σ = 362221536. Its totient is φ = 332036364.

The previous prime is 347128937. The next prime is 347128997. The reversal of 347128949 is 949821743.

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 not a de Polignac number, because 347128949 - 2²⁴ = 330351733 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 (347158949) 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 3 ways as a sum of consecutive naturals, for example, 7546259 + ... + 7546304.

It is an arithmetic number, because the mean of its divisors is an integer number (90555384).

Almost surely, 2^347128949 is an apocalyptic number.

It is an amenable number.

347128949 is a deficient number, since it is larger than the sum of its proper divisors (15092587).

347128949 is a wasteful number, since it uses less digits than its factorization.

347128949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15092586.

The product of its digits is 435456, while the sum is 47.

The square root of 347128949 is about 18631.3968612125. The cubic root of 347128949 is about 702.7976130359.

The spelling of 347128949 in words is "three hundred forty-seven million, one hundred twenty-eight thousand, nine hundred forty-nine".