348849721 has 4 divisors (see below), whose sum is σ = 380563344. Its totient is φ = 317136100.

The previous prime is 348849679. The next prime is 348849737. The reversal of 348849721 is 127948843.

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: 127948843 = 11 ⋅11631713.

It is a cyclic number.

It is not a de Polignac number, because 348849721 - 2⁷ = 348849593 is a prime.

It is a super-2 number, since 2×348849721² = 243392255683555682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (348849751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15856795 + ... + 15856816.

It is an arithmetic number, because the mean of its divisors is an integer number (95140836).

Almost surely, 2^348849721 is an apocalyptic number.

It is an amenable number.

348849721 is a deficient number, since it is larger than the sum of its proper divisors (31713623).

348849721 is a wasteful number, since it uses less digits than its factorization.

348849721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31713622.

The product of its digits is 387072, while the sum is 46.

The square root of 348849721 is about 18677.5191339749. The cubic root of 348849721 is about 703.9569916316.

The spelling of 348849721 in words is "three hundred forty-eight million, eight hundred forty-nine thousand, seven hundred twenty-one".