340048321 has 2 divisors, whose sum is σ = 340048322. Its totient is φ = 340048320.

The previous prime is 340048273. The next prime is 340048363. The reversal of 340048321 is 123840043.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 223084096 + 116964225 = 14936^2 + 10815^2 .

It is a cyclic number.

It is not a de Polignac number, because 340048321 - 2⁷ = 340048193 is a prime.

It is a super-2 number, since 2×340048321² = 231265721229838082, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (340048391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170024160 + 170024161.

It is an arithmetic number, because the mean of its divisors is an integer number (170024161).

Almost surely, 2^340048321 is an apocalyptic number.

It is an amenable number.

340048321 is a deficient number, since it is larger than the sum of its proper divisors (1).

340048321 is an equidigital number, since it uses as much as digits as its factorization.

340048321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 340048321 is about 18440.3991551159. The cubic root of 340048321 is about 697.9862676313.

Adding to 340048321 its reverse (123840043), we get a palindrome (463888364).

The spelling of 340048321 in words is "three hundred forty million, forty-eight thousand, three hundred twenty-one".