340040400509 has 2 divisors, whose sum is σ = 340040400510. Its totient is φ = 340040400508.

The previous prime is 340040400407. The next prime is 340040400529. The reversal of 340040400509 is 905004040043.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 301390020100 + 38650380409 = 548990^2 + 196597^2 .

It is a cyclic number.

It is not a de Polignac number, because 340040400509 - 2¹² = 340040396413 is a prime.

It is a super-2 number, since 2×340040400509² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340040400529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170020200254 + 170020200255.

It is an arithmetic number, because the mean of its divisors is an integer number (170020200255).

Almost surely, 2^340040400509 is an apocalyptic number.

It is an amenable number.

340040400509 is a deficient number, since it is larger than the sum of its proper divisors (1).

340040400509 is an equidigital number, since it uses as much as digits as its factorization.

340040400509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 29.

The spelling of 340040400509 in words is "three hundred forty billion, forty million, four hundred thousand, five hundred nine".