340465621 has 2 divisors, whose sum is σ = 340465622. Its totient is φ = 340465620.

The previous prime is 340465561. The next prime is 340465639. The reversal of 340465621 is 126564043.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 246647025 + 93818596 = 15705^2 + 9686^2 .

It is a cyclic number.

It is not a de Polignac number, because 340465621 - 2⁷ = 340465493 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 (340465651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170232810 + 170232811.

It is an arithmetic number, because the mean of its divisors is an integer number (170232811).

Almost surely, 2^340465621 is an apocalyptic number.

It is an amenable number.

340465621 is a deficient number, since it is larger than the sum of its proper divisors (1).

340465621 is an equidigital number, since it uses as much as digits as its factorization.

340465621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 340465621 is about 18451.7105169141. The cubic root of 340465621 is about 698.2716688386.

The spelling of 340465621 in words is "three hundred forty million, four hundred sixty-five thousand, six hundred twenty-one".