349471139 has 2 divisors, whose sum is σ = 349471140. Its totient is φ = 349471138.

The previous prime is 349471127. The next prime is 349471169. The reversal of 349471139 is 931174943.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-349471139 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 349471096 and 349471105.

It is not a weakly prime, because it can be changed into another prime (349471169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174735569 + 174735570.

It is an arithmetic number, because the mean of its divisors is an integer number (174735570).

Almost surely, 2^349471139 is an apocalyptic number.

349471139 is a deficient number, since it is larger than the sum of its proper divisors (1).

349471139 is an equidigital number, since it uses as much as digits as its factorization.

349471139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 41.

The square root of 349471139 is about 18694.1471856835. The cubic root of 349471139 is about 704.3747379438.

The spelling of 349471139 in words is "three hundred forty-nine million, four hundred seventy-one thousand, one hundred thirty-nine".