744085861 has 4 divisors (see below), whose sum is σ = 754278892. Its totient is φ = 733892832.

The previous prime is 744085843. The next prime is 744085877. The reversal of 744085861 is 168580447.

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 515017636 + 229068225 = 22694^2 + 15135^2 .

It is a cyclic number.

It is not a de Polignac number, because 744085861 - 2⁵ = 744085829 is a prime.

It is a super-2 number, since 2×744085861² = 1107327537080222642, 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 (744085841) 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, 5096406 + ... + 5096551.

It is an arithmetic number, because the mean of its divisors is an integer number (188569723).

Almost surely, 2^744085861 is an apocalyptic number.

It is an amenable number.

744085861 is a deficient number, since it is larger than the sum of its proper divisors (10193031).

744085861 is a wasteful number, since it uses less digits than its factorization.

744085861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10193030.

The product of its (nonzero) digits is 215040, while the sum is 43.

The square root of 744085861 is about 27277.9372570581. The cubic root of 744085861 is about 906.1658350945.

The spelling of 744085861 in words is "seven hundred forty-four million, eighty-five thousand, eight hundred sixty-one".