724828086821 has 2 divisors, whose sum is σ = 724828086822. Its totient is φ = 724828086820.

The previous prime is 724828086779. The next prime is 724828086919. The reversal of 724828086821 is 128680828427.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 664736918596 + 60091168225 = 815314^2 + 245135^2 .

It is a cyclic number.

It is not a de Polignac number, because 724828086821 - 2²² = 724823892517 is a prime.

It is a super-2 number, since 2×724828086821² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (724828086221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362414043410 + 362414043411.

It is an arithmetic number, because the mean of its divisors is an integer number (362414043411).

Almost surely, 2^724828086821 is an apocalyptic number.

It is an amenable number.

724828086821 is a deficient number, since it is larger than the sum of its proper divisors (1).

724828086821 is an equidigital number, since it uses as much as digits as its factorization.

724828086821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5505024, while the sum is 56.

The spelling of 724828086821 in words is "seven hundred twenty-four billion, eight hundred twenty-eight million, eighty-six thousand, eight hundred twenty-one".