340400017 has 2 divisors, whose sum is σ = 340400018. Its totient is φ = 340400016.

The previous prime is 340399981. The next prime is 340400051. The reversal of 340400017 is 710004043.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 198218241 + 142181776 = 14079^2 + 11924^2 .

It is a cyclic number.

It is not a de Polignac number, because 340400017 - 2¹⁵ = 340367249 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 340399967 and 340400003.

It is not a weakly prime, because it can be changed into another prime (340400077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170200008 + 170200009.

It is an arithmetic number, because the mean of its divisors is an integer number (170200009).

Almost surely, 2^340400017 is an apocalyptic number.

It is an amenable number.

340400017 is a deficient number, since it is larger than the sum of its proper divisors (1).

340400017 is an equidigital number, since it uses as much as digits as its factorization.

340400017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 340400017 is about 18449.9327099044. The cubic root of 340400017 is about 698.2268161874.

The spelling of 340400017 in words is "three hundred forty million, four hundred thousand, seventeen".