613444406 has 4 divisors (see below), whose sum is σ = 920166612. Its totient is φ = 306722202.

The previous prime is 613444397. The next prime is 613444409. The reversal of 613444406 is 604444316.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (613444409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153361100 + ... + 153361103.

It is an arithmetic number, because the mean of its divisors is an integer number (230041653).

Almost surely, 2^613444406 is an apocalyptic number.

613444406 is a deficient number, since it is larger than the sum of its proper divisors (306722206).

613444406 is a wasteful number, since it uses less digits than its factorization.

613444406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306722205.

The product of its (nonzero) digits is 27648, while the sum is 32.

The square root of 613444406 is about 24767.8098749163. The cubic root of 613444406 is about 849.6858843949.

The spelling of 613444406 in words is "six hundred thirteen million, four hundred forty-four thousand, four hundred six".