744025981 has 2 divisors, whose sum is σ = 744025982. Its totient is φ = 744025980.

The previous prime is 744025979. The next prime is 744025991. The reversal of 744025981 is 189520447.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 515744100 + 228281881 = 22710^2 + 15109^2 .

It is a cyclic number.

It is not a de Polignac number, because 744025981 - 2¹ = 744025979 is a prime.

It is a super-2 number, since 2×744025981² = 1107149320806024722, which contains 22 as substring.

Together with 744025979, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (744025901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 372012990 + 372012991.

It is an arithmetic number, because the mean of its divisors is an integer number (372012991).

Almost surely, 2^744025981 is an apocalyptic number.

It is an amenable number.

744025981 is a deficient number, since it is larger than the sum of its proper divisors (1).

744025981 is an equidigital number, since it uses as much as digits as its factorization.

744025981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 744025981 is about 27276.8396446509. The cubic root of 744025981 is about 906.1415266696.

The spelling of 744025981 in words is "seven hundred forty-four million, twenty-five thousand, nine hundred eighty-one".