349087861 has 2 divisors, whose sum is σ = 349087862. Its totient is φ = 349087860.

The previous prime is 349087801. The next prime is 349087873. The reversal of 349087861 is 168780943.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 299947761 + 49140100 = 17319^2 + 7010^2 .

It is a cyclic number.

It is not a de Polignac number, because 349087861 - 2¹¹ = 349085813 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (349087801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174543930 + 174543931.

It is an arithmetic number, because the mean of its divisors is an integer number (174543931).

Almost surely, 2^349087861 is an apocalyptic number.

It is an amenable number.

349087861 is a deficient number, since it is larger than the sum of its proper divisors (1).

349087861 is an equidigital number, since it uses as much as digits as its factorization.

349087861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 46.

The square root of 349087861 is about 18683.8930900388. The cubic root of 349087861 is about 704.1171390878.

The spelling of 349087861 in words is "three hundred forty-nine million, eighty-seven thousand, eight hundred sixty-one".