773981641 has 8 divisors (see below), whose sum is σ = 800137800. Its totient is φ = 748172160.

The previous prime is 773981629. The next prime is 773981669. The reversal of 773981641 is 146189377.

It can be written as a sum of positive squares in 4 ways, for example, as 35283600 + 738698041 = 5940^2 + 27179^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 773981641 - 2⁹ = 773981129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 773981591 and 773981600.

It is not an unprimeable number, because it can be changed into a prime (773901641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82126 + ... + 91063.

It is an arithmetic number, because the mean of its divisors is an integer number (100017225).

Almost surely, 2^773981641 is an apocalyptic number.

It is an amenable number.

773981641 is a deficient number, since it is larger than the sum of its proper divisors (26156159).

773981641 is a wasteful number, since it uses less digits than its factorization.

773981641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173339.

The product of its digits is 254016, while the sum is 46.

The square root of 773981641 is about 27820.5255342166. The cubic root of 773981641 is about 918.1427722717.

The spelling of 773981641 in words is "seven hundred seventy-three million, nine hundred eighty-one thousand, six hundred forty-one".