349782813 has 16 divisors (see below), whose sum is σ = 525933760. Its totient is φ = 229706928.

The previous prime is 349782809. The next prime is 349782847. The reversal of 349782813 is 318287943.

349782813 is a `hidden beast` number, since 3 + 497 + 82 + 81 + 3 = 666.

It is not a de Polignac number, because 349782813 - 2² = 349782809 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 (349783813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94870 + ... + 98487.

It is an arithmetic number, because the mean of its divisors is an integer number (32870860).

Almost surely, 2^349782813 is an apocalyptic number.

It is an amenable number.

349782813 is a deficient number, since it is larger than the sum of its proper divisors (176150947).

349782813 is a wasteful number, since it uses less digits than its factorization.

349782813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193433 (or 193427 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 349782813 is about 18702.4814663723. The cubic root of 349782813 is about 704.5840733616.

The spelling of 349782813 in words is "three hundred forty-nine million, seven hundred eighty-two thousand, eight hundred thirteen".