348857749 has 4 divisors (see below), whose sum is σ = 349446636. Its totient is φ = 348268864.

The previous prime is 348857699. The next prime is 348857783. The reversal of 348857749 is 947758843.

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

It can be written as a sum of positive squares in 2 ways, for example, as 310640625 + 38217124 = 17625^2 + 6182^2 .

It is a cyclic number.

It is not a de Polignac number, because 348857749 - 2¹¹ = 348855701 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 348857749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (348857449) 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, 293554 + ... + 294739.

It is an arithmetic number, because the mean of its divisors is an integer number (87361659).

Almost surely, 2^348857749 is an apocalyptic number.

It is an amenable number.

348857749 is a deficient number, since it is larger than the sum of its proper divisors (588887).

348857749 is an equidigital number, since it uses as much as digits as its factorization.

348857749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588886.

The product of its digits is 6773760, while the sum is 55.

The square root of 348857749 is about 18677.7340435075. The cubic root of 348857749 is about 703.9623915914.

The spelling of 348857749 in words is "three hundred forty-eight million, eight hundred fifty-seven thousand, seven hundred forty-nine".