347739813 has 6 divisors (see below), whose sum is σ = 502290854. Its totient is φ = 231826536.

The previous prime is 347739787. The next prime is 347739817. The reversal of 347739813 is 318937743.

It can be written as a sum of positive squares in only one way, i.e., 342731169 + 5008644 = 18513^2 + 2238^2 .

It is not a de Polignac number, because 347739813 - 2⁵ = 347739781 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (347739817) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19318870 + ... + 19318887.

Almost surely, 2^347739813 is an apocalyptic number.

It is an amenable number.

347739813 is a deficient number, since it is larger than the sum of its proper divisors (154551041).

347739813 is a wasteful number, since it uses less digits than its factorization.

347739813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38637763 (or 38637760 counting only the distinct ones).

The product of its digits is 381024, while the sum is 45.

The square root of 347739813 is about 18647.7830585837. The cubic root of 347739813 is about 703.2096234030.

The spelling of 347739813 in words is "three hundred forty-seven million, seven hundred thirty-nine thousand, eight hundred thirteen".