340038823 has 2 divisors, whose sum is σ = 340038824. Its totient is φ = 340038822.

The previous prime is 340038773. The next prime is 340038841. The reversal of 340038823 is 328830043.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 340038823 - 2²¹ = 337941671 is a prime.

It is a super-2 number, since 2×340038823² = 231252802294450658, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340038893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170019411 + 170019412.

It is an arithmetic number, because the mean of its divisors is an integer number (170019412).

Almost surely, 2^340038823 is an apocalyptic number.

340038823 is a deficient number, since it is larger than the sum of its proper divisors (1).

340038823 is an equidigital number, since it uses as much as digits as its factorization.

340038823 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 340038823 is about 18440.1416209312. The cubic root of 340038823 is about 697.9797690105.

Adding to 340038823 its reverse (328830043), we get a palindrome (668868866).

The spelling of 340038823 in words is "three hundred forty million, thirty-eight thousand, eight hundred twenty-three".