349094021 has 2 divisors, whose sum is σ = 349094022. Its totient is φ = 349094020.

The previous prime is 349093999. The next prime is 349094041. The reversal of 349094021 is 120490943.

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., 329821921 + 19272100 = 18161^2 + 4390^2 .

It is an emirp because it is prime and its reverse (120490943) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 349094021 - 2¹⁴ = 349077637 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 (349094041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174547010 + 174547011.

It is an arithmetic number, because the mean of its divisors is an integer number (174547011).

Almost surely, 2^349094021 is an apocalyptic number.

It is an amenable number.

349094021 is a deficient number, since it is larger than the sum of its proper divisors (1).

349094021 is an equidigital number, since it uses as much as digits as its factorization.

349094021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 349094021 is about 18684.0579371827. The cubic root of 349094021 is about 704.1212806775.

The spelling of 349094021 in words is "three hundred forty-nine million, ninety-four thousand, twenty-one".