773031421 has 2 divisors, whose sum is σ = 773031422. Its totient is φ = 773031420.

The previous prime is 773031409. The next prime is 773031431. The reversal of 773031421 is 124130377.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 648262521 + 124768900 = 25461^2 + 11170^2 .

It is a cyclic number.

It is not a de Polignac number, because 773031421 - 2¹¹ = 773029373 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 773031421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (773031401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 386515710 + 386515711.

It is an arithmetic number, because the mean of its divisors is an integer number (386515711).

Almost surely, 2^773031421 is an apocalyptic number.

It is an amenable number.

773031421 is a deficient number, since it is larger than the sum of its proper divisors (1).

773031421 is an equidigital number, since it uses as much as digits as its factorization.

773031421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3528, while the sum is 28.

The square root of 773031421 is about 27803.4426105833. The cubic root of 773031421 is about 917.7668826924.

Adding to 773031421 its reverse (124130377), we get a palindrome (897161798).

The spelling of 773031421 in words is "seven hundred seventy-three million, thirty-one thousand, four hundred twenty-one".