340401423 has 4 divisors (see below), whose sum is σ = 453868568. Its totient is φ = 226934280.

The previous prime is 340401419. The next prime is 340401461. The reversal of 340401423 is 324104043.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 324104043 = 3 ⋅108034681.

It is not a de Polignac number, because 340401423 - 2² = 340401419 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 340401423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340401463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56733568 + ... + 56733573.

It is an arithmetic number, because the mean of its divisors is an integer number (113467142).

Almost surely, 2^340401423 is an apocalyptic number.

340401423 is a deficient number, since it is larger than the sum of its proper divisors (113467145).

340401423 is a wasteful number, since it uses less digits than its factorization.

340401423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113467144.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 340401423 is about 18449.9708129850. The cubic root of 340401423 is about 698.2277775128.

Adding to 340401423 its reverse (324104043), we get a palindrome (664505466).

The spelling of 340401423 in words is "three hundred forty million, four hundred one thousand, four hundred twenty-three".