349638981 has 4 divisors (see below), whose sum is σ = 466185312. Its totient is φ = 233092652.

The previous prime is 349638953. The next prime is 349638997. The reversal of 349638981 is 189836943.

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.

It is a cyclic number.

It is not a de Polignac number, because 349638981 - 2⁶ = 349638917 is a prime.

It is a super-2 number, since 2×349638981² = 244494834069436722, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (349638281) 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, 58273161 + ... + 58273166.

It is an arithmetic number, because the mean of its divisors is an integer number (116546328).

Almost surely, 2^349638981 is an apocalyptic number.

It is an amenable number.

349638981 is a deficient number, since it is larger than the sum of its proper divisors (116546331).

349638981 is a wasteful number, since it uses less digits than its factorization.

349638981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116546330.

The product of its digits is 1119744, while the sum is 51.

The square root of 349638981 is about 18698.6358058549. The cubic root of 349638981 is about 704.4874842530.

The spelling of 349638981 in words is "three hundred forty-nine million, six hundred thirty-eight thousand, nine hundred eighty-one".