349734431 has 2 divisors, whose sum is σ = 349734432. Its totient is φ = 349734430.

The previous prime is 349734401. The next prime is 349734433. The reversal of 349734431 is 134437943.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-349734431 is a prime.

It is a super-2 number, since 2×349734431² = 244628344453787522, which contains 22 as substring.

Together with 349734433, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (349734433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174867215 + 174867216.

It is an arithmetic number, because the mean of its divisors is an integer number (174867216).

Almost surely, 2^349734431 is an apocalyptic number.

349734431 is a deficient number, since it is larger than the sum of its proper divisors (1).

349734431 is an equidigital number, since it uses as much as digits as its factorization.

349734431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 38.

The square root of 349734431 is about 18701.1879569187. The cubic root of 349734431 is about 704.5515858129.

The spelling of 349734431 in words is "three hundred forty-nine million, seven hundred thirty-four thousand, four hundred thirty-one".