349824421 has 4 divisors (see below), whose sum is σ = 352579072. Its totient is φ = 347069772.

The previous prime is 349824347. The next prime is 349824427. The reversal of 349824421 is 124428943.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 124428943 = 197 ⋅631619.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-349824421 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 (349824427) 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, 1377135 + ... + 1377388.

It is an arithmetic number, because the mean of its divisors is an integer number (88144768).

Almost surely, 2^349824421 is an apocalyptic number.

It is an amenable number.

349824421 is a deficient number, since it is larger than the sum of its proper divisors (2754651).

349824421 is a wasteful number, since it uses less digits than its factorization.

349824421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2754650.

The product of its digits is 55296, while the sum is 37.

The square root of 349824421 is about 18703.5937990537. The cubic root of 349824421 is about 704.6120099084.

The spelling of 349824421 in words is "three hundred forty-nine million, eight hundred twenty-four thousand, four hundred twenty-one".