346648409 has 2 divisors, whose sum is σ = 346648410. Its totient is φ = 346648408.

The previous prime is 346648391. The next prime is 346648427. The reversal of 346648409 is 904846643.

It is a balanced prime because it is at equal distance from previous prime (346648391) and next prime (346648427).

It can be written as a sum of positive squares in only one way, i.e., 344919184 + 1729225 = 18572^2 + 1315^2 .

It is an emirp because it is prime and its reverse (904846643) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 346648409 - 2¹² = 346644313 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 346648409.

It is not a weakly prime, because it can be changed into another prime (346648459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 173324204 + 173324205.

It is an arithmetic number, because the mean of its divisors is an integer number (173324205).

Almost surely, 2^346648409 is an apocalyptic number.

It is an amenable number.

346648409 is a deficient number, since it is larger than the sum of its proper divisors (1).

346648409 is an equidigital number, since it uses as much as digits as its factorization.

346648409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 497664, while the sum is 44.

The square root of 346648409 is about 18618.4964215696. The cubic root of 346648409 is about 702.4731626885.

The spelling of 346648409 in words is "three hundred forty-six million, six hundred forty-eight thousand, four hundred nine".