349689897 has 12 divisors (see below), whose sum is σ = 508796340. Its totient is φ = 231424128.

The previous prime is 349689887. The next prime is 349689941. The reversal of 349689897 is 798986943.

It can be written as a sum of positive squares in 2 ways, for example, as 134304921 + 215384976 = 11589^2 + 14676^2 .

It is not a de Polignac number, because 349689897 - 2⁶ = 349689833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (349689887) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 140572 + ... + 143037.

It is an arithmetic number, because the mean of its divisors is an integer number (42399695).

Almost surely, 2^349689897 is an apocalyptic number.

It is an amenable number.

349689897 is a deficient number, since it is larger than the sum of its proper divisors (159106443).

349689897 is a wasteful number, since it uses less digits than its factorization.

349689897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283752 (or 283749 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 63.

The square root of 349689897 is about 18699.9972459891. The cubic root of 349689897 is about 704.5216794712.

The spelling of 349689897 in words is "three hundred forty-nine million, six hundred eighty-nine thousand, eight hundred ninety-seven".