44073721 has 4 divisors (see below), whose sum is σ = 44149392. Its totient is φ = 43998052.

The previous prime is 44073719. The next prime is 44073737. The reversal of 44073721 is 12737044.

44073721 = T₅₅ + T₅₆ + ... + T₆₄₁.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 44073721 - 2¹ = 44073719 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 44073721.

It is not an unprimeable number, because it can be changed into a prime (44073791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36955 + ... + 38128.

It is an arithmetic number, because the mean of its divisors is an integer number (11037348).

Almost surely, 2^44073721 is an apocalyptic number.

It is an amenable number.

44073721 is a deficient number, since it is larger than the sum of its proper divisors (75671).

44073721 is an equidigital number, since it uses as much as digits as its factorization.

44073721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75670.

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 44073721 is about 6638.8041844899. The cubic root of 44073721 is about 353.2318907986.

It can be divided in two parts, 4407 and 3721, that added together give a triangular number (8128 = T₁₂₇).

The spelling of 44073721 in words is "forty-four million, seventy-three thousand, seven hundred twenty-one".