340880521 has 2 divisors, whose sum is σ = 340880522. Its totient is φ = 340880520.

The previous prime is 340880513. The next prime is 340880543. The reversal of 340880521 is 125088043.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 291726400 + 49154121 = 17080^2 + 7011^2 .

It is an emirp because it is prime and its reverse (125088043) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 340880521 - 2³ = 340880513 is a prime.

It is not a weakly prime, because it can be changed into another prime (340880621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170440260 + 170440261.

It is an arithmetic number, because the mean of its divisors is an integer number (170440261).

Almost surely, 2^340880521 is an apocalyptic number.

It is an amenable number.

340880521 is a deficient number, since it is larger than the sum of its proper divisors (1).

340880521 is an equidigital number, since it uses as much as digits as its factorization.

340880521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 340880521 is about 18462.9499538942. The cubic root of 340880521 is about 698.5551975253. Note that the first 3 decimals are identical.

The spelling of 340880521 in words is "three hundred forty million, eight hundred eighty thousand, five hundred twenty-one".