340140403 has 4 divisors (see below), whose sum is σ = 360148680. Its totient is φ = 320132128.

The previous prime is 340140347. The next prime is 340140421. The reversal of 340140403 is 304041043.

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 340140403 - 2²⁵ = 306585971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (340140473) 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, 10004113 + ... + 10004146.

It is an arithmetic number, because the mean of its divisors is an integer number (90037170).

Almost surely, 2^340140403 is an apocalyptic number.

340140403 is a deficient number, since it is larger than the sum of its proper divisors (20008277).

340140403 is a wasteful number, since it uses less digits than its factorization.

340140403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20008276.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 340140403 is about 18442.8957325036. The cubic root of 340140403 is about 698.0492647281.

Adding to 340140403 its reverse (304041043), we get a palindrome (644181446).

The spelling of 340140403 in words is "three hundred forty million, one hundred forty thousand, four hundred three".