349521661 has 8 divisors (see below), whose sum is σ = 353655360. Its totient is φ = 345411168.

The previous prime is 349521637. The next prime is 349521671. The reversal of 349521661 is 166125943.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 349521661 - 2⁵ = 349521629 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 349521661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (349521671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25480 + ... + 36718.

It is an arithmetic number, because the mean of its divisors is an integer number (44206920).

Almost surely, 2^349521661 is an apocalyptic number.

It is an amenable number.

349521661 is a deficient number, since it is larger than the sum of its proper divisors (4133699).

349521661 is a wasteful number, since it uses less digits than its factorization.

349521661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11603.

The product of its digits is 38880, while the sum is 37.

The square root of 349521661 is about 18695.4984153940. The cubic root of 349521661 is about 704.4086794265.

The spelling of 349521661 in words is "three hundred forty-nine million, five hundred twenty-one thousand, six hundred sixty-one".