340023403 has 4 divisors (see below), whose sum is σ = 347930968. Its totient is φ = 332115840.

The previous prime is 340023401. The next prime is 340023413. The reversal of 340023403 is 304320043.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 340023403 - 2¹ = 340023401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (340023401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3953718 + ... + 3953803.

It is an arithmetic number, because the mean of its divisors is an integer number (86982742).

Almost surely, 2^340023403 is an apocalyptic number.

340023403 is a deficient number, since it is larger than the sum of its proper divisors (7907565).

340023403 is an equidigital number, since it uses as much as digits as its factorization.

340023403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7907564.

The product of its (nonzero) digits is 864, while the sum is 19.

The square root of 340023403 is about 18439.7235066039. The cubic root of 340023403 is about 697.9692182439.

Adding to 340023403 its reverse (304320043), we get a palindrome (644343446).

The spelling of 340023403 in words is "three hundred forty million, twenty-three thousand, four hundred three".