340420340431 has 2 divisors, whose sum is σ = 340420340432. Its totient is φ = 340420340430.

The previous prime is 340420340291. The next prime is 340420340467. The reversal of 340420340431 is 134043024043.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 340420340431 - 2¹⁷ = 340420209359 is a prime.

It is a super-2 number, since 2×340420340431² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 340420340431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340420340131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170210170215 + 170210170216.

It is an arithmetic number, because the mean of its divisors is an integer number (170210170216).

Almost surely, 2^340420340431 is an apocalyptic number.

340420340431 is a deficient number, since it is larger than the sum of its proper divisors (1).

340420340431 is an equidigital number, since it uses as much as digits as its factorization.

340420340431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 340420340431 its reverse (134043024043), we get a palindrome (474463364474).

The spelling of 340420340431 in words is "three hundred forty billion, four hundred twenty million, three hundred forty thousand, four hundred thirty-one".