349493831 has 2 divisors, whose sum is σ = 349493832. Its totient is φ = 349493830.

The previous prime is 349493821. The next prime is 349493839. The reversal of 349493831 is 138394943.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 349493831 - 2²² = 345299527 is a prime.

It is a super-2 number, since 2×349493831² = 244291875814113122, which contains 22 as substring.

It is equal to p_18777644 and since 349493831 and 18777644 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (349493839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174746915 + 174746916.

It is an arithmetic number, because the mean of its divisors is an integer number (174746916).

Almost surely, 2^349493831 is an apocalyptic number.

349493831 is a deficient number, since it is larger than the sum of its proper divisors (1).

349493831 is an equidigital number, since it uses as much as digits as its factorization.

349493831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 279936, while the sum is 44.

The square root of 349493831 is about 18694.7541037586. The cubic root of 349493831 is about 704.3899831948.

The spelling of 349493831 in words is "three hundred forty-nine million, four hundred ninety-three thousand, eight hundred thirty-one".