349745279 has 4 divisors (see below), whose sum is σ = 376648776. Its totient is φ = 322841784.

The previous prime is 349745243. The next prime is 349745281. The reversal of 349745279 is 972547943.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 972547943 = 251 ⋅3874693.

It is a cyclic number.

It is not a de Polignac number, because 349745279 - 2²⁰ = 348696703 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (349745479) 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, 13451729 + ... + 13451754.

It is an arithmetic number, because the mean of its divisors is an integer number (94162194).

Almost surely, 2^349745279 is an apocalyptic number.

349745279 is a deficient number, since it is larger than the sum of its proper divisors (26903497).

349745279 is a wasteful number, since it uses less digits than its factorization.

349745279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26903496.

The product of its digits is 1905120, while the sum is 50.

The square root of 349745279 is about 18701.4779897205. The cubic root of 349745279 is about 704.5588702892.

The spelling of 349745279 in words is "three hundred forty-nine million, seven hundred forty-five thousand, two hundred seventy-nine".