1944724081 has 4 divisors (see below), whose sum is σ = 2047078000. Its totient is φ = 1842370164.

The previous prime is 1944724073. The next prime is 1944724109. The reversal of 1944724081 is 1804274491.

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 1944724081 - 2³ = 1944724073 is a prime.

It is a super-2 number, since 2×1944724081² = 7563903502442589122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1944724031) 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, 51176931 + ... + 51176968.

It is an arithmetic number, because the mean of its divisors is an integer number (511769500).

Almost surely, 2^1944724081 is an apocalyptic number.

It is an amenable number.

1944724081 is a deficient number, since it is larger than the sum of its proper divisors (102353919).

1944724081 is a wasteful number, since it uses less digits than its factorization.

1944724081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102353918.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 1944724081 is about 44099.0258509187. The cubic root of 1944724081 is about 1248.2052282154.

The spelling of 1944724081 in words is "one billion, nine hundred forty-four million, seven hundred twenty-four thousand, eighty-one".