349876661 has 2 divisors, whose sum is σ = 349876662. Its totient is φ = 349876660.

The previous prime is 349876649. The next prime is 349876673. The reversal of 349876661 is 166678943.

It is a balanced prime because it is at equal distance from previous prime (349876649) and next prime (349876673).

It can be written as a sum of positive squares in only one way, i.e., 316306225 + 33570436 = 17785^2 + 5794^2 .

It is a cyclic number.

It is not a de Polignac number, because 349876661 - 2¹⁰ = 349875637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (349876361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174938330 + 174938331.

It is an arithmetic number, because the mean of its divisors is an integer number (174938331).

Almost surely, 2^349876661 is an apocalyptic number.

It is an amenable number.

349876661 is a deficient number, since it is larger than the sum of its proper divisors (1).

349876661 is an equidigital number, since it uses as much as digits as its factorization.

349876661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 50.

The square root of 349876661 is about 18704.9902699788. The cubic root of 349876661 is about 704.6470818827.

The spelling of 349876661 in words is "three hundred forty-nine million, eight hundred seventy-six thousand, six hundred sixty-one".