340662121 has 2 divisors, whose sum is σ = 340662122. Its totient is φ = 340662120.

The previous prime is 340662109. The next prime is 340662139. The reversal of 340662121 is 121266043.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 241460521 + 99201600 = 15539^2 + 9960^2 .

It is an emirp because it is prime and its reverse (121266043) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 340662121 - 2²⁷ = 206444393 is a prime.

It is not a weakly prime, because it can be changed into another prime (340662151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170331060 + 170331061.

It is an arithmetic number, because the mean of its divisors is an integer number (170331061).

Almost surely, 2^340662121 is an apocalyptic number.

It is an amenable number.

340662121 is a deficient number, since it is larger than the sum of its proper divisors (1).

340662121 is an equidigital number, since it uses as much as digits as its factorization.

340662121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 340662121 is about 18457.0344584389. The cubic root of 340662121 is about 698.4059790164.

The spelling of 340662121 in words is "three hundred forty million, six hundred sixty-two thousand, one hundred twenty-one".