340038997 has 2 divisors, whose sum is σ = 340038998. Its totient is φ = 340038996.

The previous prime is 340038971. The next prime is 340039087. The reversal of 340038997 is 799830043.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 265233796 + 74805201 = 16286^2 + 8649^2 .

It is an emirp because it is prime and its reverse (799830043) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 340038997 - 2¹⁹ = 339514709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340038967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170019498 + 170019499.

It is an arithmetic number, because the mean of its divisors is an integer number (170019499).

Almost surely, 2^340038997 is an apocalyptic number.

It is an amenable number.

340038997 is a deficient number, since it is larger than the sum of its proper divisors (1).

340038997 is an equidigital number, since it uses as much as digits as its factorization.

340038997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 340038997 is about 18440.1463388987. The cubic root of 340038997 is about 697.9798880640.

The spelling of 340038997 in words is "three hundred forty million, thirty-eight thousand, nine hundred ninety-seven".