349917831 has 12 divisors (see below), whose sum is σ = 505742952. Its totient is φ = 233137296.

The previous prime is 349917809. The next prime is 349917839. The reversal of 349917831 is 138719943.

It is not a de Polignac number, because 349917831 - 2⁶ = 349917767 is a prime.

It is a super-2 number, since 2×349917831² = 244884976903489122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (349917839) 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, 5205 + ... + 26961.

It is an arithmetic number, because the mean of its divisors is an integer number (42145246).

Almost surely, 2^349917831 is an apocalyptic number.

349917831 is a deficient number, since it is larger than the sum of its proper divisors (155825121).

349917831 is a wasteful number, since it uses less digits than its factorization.

349917831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23550 (or 23547 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 349917831 is about 18706.0907460645. The cubic root of 349917831 is about 704.6747194149.

The spelling of 349917831 in words is "three hundred forty-nine million, nine hundred seventeen thousand, eight hundred thirty-one".