747421355321 has 2 divisors, whose sum is σ = 747421355322. Its totient is φ = 747421355320.

The previous prime is 747421355297. The next prime is 747421355371. The reversal of 747421355321 is 123553124747.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 490610590096 + 256810765225 = 700436^2 + 506765^2 .

It is a cyclic number.

It is not a de Polignac number, because 747421355321 - 2⁶ = 747421355257 is a prime.

It is not a weakly prime, because it can be changed into another prime (747421355371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 373710677660 + 373710677661.

It is an arithmetic number, because the mean of its divisors is an integer number (373710677661).

Almost surely, 2^747421355321 is an apocalyptic number.

It is an amenable number.

747421355321 is a deficient number, since it is larger than the sum of its proper divisors (1).

747421355321 is an equidigital number, since it uses as much as digits as its factorization.

747421355321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 705600, while the sum is 44.

The spelling of 747421355321 in words is "seven hundred forty-seven billion, four hundred twenty-one million, three hundred fifty-five thousand, three hundred twenty-one".