773050021 has 4 divisors (see below), whose sum is σ = 773116812. Its totient is φ = 772983232.

The previous prime is 773049989. The next prime is 773050043. The reversal of 773050021 is 120050377.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 393228900 + 379821121 = 19830^2 + 19489^2 .

It is a cyclic number.

It is not a de Polignac number, because 773050021 - 2⁵ = 773049989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (773050081) 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, 11050 + ... + 40843.

It is an arithmetic number, because the mean of its divisors is an integer number (193279203).

Almost surely, 2^773050021 is an apocalyptic number.

It is an amenable number.

773050021 is a deficient number, since it is larger than the sum of its proper divisors (66791).

773050021 is a wasteful number, since it uses less digits than its factorization.

773050021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66790.

The product of its (nonzero) digits is 1470, while the sum is 25.

The square root of 773050021 is about 27803.7770995237. Note that the first 3 decimals coincide. The cubic root of 773050021 is about 917.7742434657.

The spelling of 773050021 in words is "seven hundred seventy-three million, fifty thousand, twenty-one".