773530721 has 8 divisors (see below), whose sum is σ = 782271360. Its totient is φ = 764813952.

The previous prime is 773530697. The next prime is 773530727. The reversal of 773530721 is 127035377.

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 773530721 - 2¹⁴ = 773514337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (773530727) 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 in 7 ways as a sum of consecutive naturals, for example, 63740 + ... + 74898.

It is an arithmetic number, because the mean of its divisors is an integer number (97783920).

Almost surely, 2^773530721 is an apocalyptic number.

It is an amenable number.

773530721 is a deficient number, since it is larger than the sum of its proper divisors (8740639).

773530721 is a wasteful number, since it uses less digits than its factorization.

773530721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11935.

The product of its (nonzero) digits is 30870, while the sum is 35.

The square root of 773530721 is about 27812.4202650542. The cubic root of 773530721 is about 917.9644349817.

The spelling of 773530721 in words is "seven hundred seventy-three million, five hundred thirty thousand, seven hundred twenty-one".