340420081 has 2 divisors, whose sum is σ = 340420082. Its totient is φ = 340420080.

The previous prime is 340420063. The next prime is 340420123. The reversal of 340420081 is 180024043.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 308880625 + 31539456 = 17575^2 + 5616^2 .

It is a cyclic number.

It is not a de Polignac number, because 340420081 - 2⁵ = 340420049 is a prime.

It is a super-2 number, since 2×340420081² = 231771663096093122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (340420051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170210040 + 170210041.

It is an arithmetic number, because the mean of its divisors is an integer number (170210041).

Almost surely, 2^340420081 is an apocalyptic number.

It is an amenable number.

340420081 is a deficient number, since it is larger than the sum of its proper divisors (1).

340420081 is an equidigital number, since it uses as much as digits as its factorization.

340420081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 340420081 is about 18450.4764437128. The cubic root of 340420081 is about 698.2405343101.

The spelling of 340420081 in words is "three hundred forty million, four hundred twenty thousand, eighty-one".