340331403 has 6 divisors (see below), whose sum is σ = 453817812. Its totient is φ = 226866300.

The previous prime is 340331399. The next prime is 340331413. The reversal of 340331403 is 304133043.

It is not a de Polignac number, because 340331403 - 2² = 340331399 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 340331403.

It is not an unprimeable number, because it can be changed into a prime (340331413) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26628 + ... + 37278.

It is an arithmetic number, because the mean of its divisors is an integer number (75636302).

Almost surely, 2^340331403 is an apocalyptic number.

340331403 is a deficient number, since it is larger than the sum of its proper divisors (113486409).

340331403 is an frugal number, since it uses more digits than its factorization.

340331403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21305 (or 10654 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 21.

The square root of 340331403 is about 18448.0731514161. The cubic root of 340331403 is about 698.1798994701.

Adding to 340331403 its reverse (304133043), we get a palindrome (644464446).

The spelling of 340331403 in words is "three hundred forty million, three hundred thirty-one thousand, four hundred three".