349437139 has 4 divisors (see below), whose sum is σ = 358881424. Its totient is φ = 339992856.

The previous prime is 349437119. The next prime is 349437163. The reversal of 349437139 is 931734943.

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

It is a cyclic number.

It is not a de Polignac number, because 349437139 - 2⁵ = 349437107 is a prime.

It is a super-2 number, since 2×349437139² = 244212628225010642, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 349437095 and 349437104.

It is not an unprimeable number, because it can be changed into a prime (349437119) 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, 4722087 + ... + 4722160.

It is an arithmetic number, because the mean of its divisors is an integer number (89720356).

Almost surely, 2^349437139 is an apocalyptic number.

349437139 is a deficient number, since it is larger than the sum of its proper divisors (9444285).

349437139 is an equidigital number, since it uses as much as digits as its factorization.

349437139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9444284.

The product of its digits is 244944, while the sum is 43.

The square root of 349437139 is about 18693.2377880345. The cubic root of 349437139 is about 704.3518943619.

The spelling of 349437139 in words is "three hundred forty-nine million, four hundred thirty-seven thousand, one hundred thirty-nine".