44001613 has 4 divisors (see below), whose sum is σ = 45518940. Its totient is φ = 42484288.

The previous prime is 44001533. The next prime is 44001619. The reversal of 44001613 is 31610044.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 36808489 + 7193124 = 6067^2 + 2682^2 .

It is a cyclic number.

It is not a de Polignac number, because 44001613 - 2⁹ = 44001101 is a prime.

It is a super-2 number, since 2×44001613² = 3872283893203538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44001619) 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, 758620 + ... + 758677.

It is an arithmetic number, because the mean of its divisors is an integer number (11379735).

Almost surely, 2^44001613 is an apocalyptic number.

It is an amenable number.

44001613 is a deficient number, since it is larger than the sum of its proper divisors (1517327).

44001613 is a wasteful number, since it uses less digits than its factorization.

44001613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1517326.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 44001613 is about 6633.3711640462. The cubic root of 44001613 is about 353.0391474586.

Adding to 44001613 its reverse (31610044), we get a palindrome (75611657).

The spelling of 44001613 in words is "forty-four million, one thousand, six hundred thirteen".