349395139 has 4 divisors (see below), whose sum is σ = 364586256. Its totient is φ = 334204024.

The previous prime is 349395121. The next prime is 349395157. The reversal of 349395139 is 931593943.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (349395121) and next prime (349395157).

It is a cyclic number.

It is not a de Polignac number, because 349395139 - 2⁹ = 349394627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (349395539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7595524 + ... + 7595569.

It is an arithmetic number, because the mean of its divisors is an integer number (91146564).

Almost surely, 2^349395139 is an apocalyptic number.

349395139 is a deficient number, since it is larger than the sum of its proper divisors (15191117).

349395139 is a wasteful number, since it uses less digits than its factorization.

349395139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15191116.

The product of its digits is 393660, while the sum is 46.

The square root of 349395139 is about 18692.1143533844. The cubic root of 349395139 is about 704.3236737737.

The spelling of 349395139 in words is "three hundred forty-nine million, three hundred ninety-five thousand, one hundred thirty-nine".