744694981 has 2 divisors, whose sum is σ = 744694982. Its totient is φ = 744694980.

The previous prime is 744694969. The next prime is 744695011. The reversal of 744694981 is 189496447.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 480924900 + 263770081 = 21930^2 + 16241^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-744694981 is a prime.

It is a super-2 number, since 2×744694981² = 1109141229453180722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (744694901) 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, 372347490 + 372347491.

It is an arithmetic number, because the mean of its divisors is an integer number (372347491).

Almost surely, 2^744694981 is an apocalyptic number.

It is an amenable number.

744694981 is a deficient number, since it is larger than the sum of its proper divisors (1).

744694981 is an equidigital number, since it uses as much as digits as its factorization.

744694981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1741824, while the sum is 52.

The square root of 744694981 is about 27289.1000401259. The cubic root of 744694981 is about 906.4130346968.

The spelling of 744694981 in words is "seven hundred forty-four million, six hundred ninety-four thousand, nine hundred eighty-one".