344021603 has 4 divisors (see below), whose sum is σ = 358979088. Its totient is φ = 329064120.

The previous prime is 344021599. The next prime is 344021609. The reversal of 344021603 is 306120443.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 306120443 = 31 ⋅9874853.

It is a cyclic number.

It is not a de Polignac number, because 344021603 - 2² = 344021599 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 14957461 = 344021603 / (3 + 4 + 4 + 0 + 2 + 1 + 6 + 0 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (344021609) 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, 7478708 + ... + 7478753.

It is an arithmetic number, because the mean of its divisors is an integer number (89744772).

Almost surely, 2^344021603 is an apocalyptic number.

344021603 is a deficient number, since it is larger than the sum of its proper divisors (14957485).

344021603 is a wasteful number, since it uses less digits than its factorization.

344021603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14957484.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 344021603 is about 18547.8193596983. The cubic root of 344021603 is about 700.6942791944.

The spelling of 344021603 in words is "three hundred forty-four million, twenty-one thousand, six hundred three".