340552621 has 2 divisors, whose sum is σ = 340552622. Its totient is φ = 340552620.

The previous prime is 340552609. The next prime is 340552627. The reversal of 340552621 is 126255043.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 244296900 + 96255721 = 15630^2 + 9811^2 .

It is an emirp because it is prime and its reverse (126255043) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 340552621 - 2²³ = 332164013 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 340552621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340552627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170276310 + 170276311.

It is an arithmetic number, because the mean of its divisors is an integer number (170276311).

Almost surely, 2^340552621 is an apocalyptic number.

It is an amenable number.

340552621 is a deficient number, since it is larger than the sum of its proper divisors (1).

340552621 is an equidigital number, since it uses as much as digits as its factorization.

340552621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 340552621 is about 18454.0678713394. The cubic root of 340552621 is about 698.3311407869.

The spelling of 340552621 in words is "three hundred forty million, five hundred fifty-two thousand, six hundred twenty-one".