340002403 has 4 divisors (see below), whose sum is σ = 366156448. Its totient is φ = 313848360.

The previous prime is 340002401. The next prime is 340002407. The reversal of 340002403 is 304200043.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 304200043 = 7 ⋅43457149.

It is a cyclic number.

It is not a de Polignac number, because 340002403 - 2¹ = 340002401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (340002401) 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, 13077003 + ... + 13077028.

It is an arithmetic number, because the mean of its divisors is an integer number (91539112).

Almost surely, 2^340002403 is an apocalyptic number.

340002403 is a deficient number, since it is larger than the sum of its proper divisors (26154045).

340002403 is a wasteful number, since it uses less digits than its factorization.

340002403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26154044.

The product of its (nonzero) digits is 288, while the sum is 16.

The square root of 340002403 is about 18439.1540749569. The cubic root of 340002403 is about 697.9548489827.

Adding to 340002403 its reverse (304200043), we get a palindrome (644202446).

The spelling of 340002403 in words is "three hundred forty million, two thousand, four hundred three".