547997621 has 2 divisors, whose sum is σ = 547997622. Its totient is φ = 547997620.

The previous prime is 547997617. The next prime is 547997627. The reversal of 547997621 is 126799745.

547997621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 503508721 + 44488900 = 22439^2 + 6670^2 .

It is a cyclic number.

It is not a de Polignac number, because 547997621 - 2² = 547997617 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 547997621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (547997627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 273998810 + 273998811.

It is an arithmetic number, because the mean of its divisors is an integer number (273998811).

Almost surely, 2^547997621 is an apocalyptic number.

It is an amenable number.

547997621 is a deficient number, since it is larger than the sum of its proper divisors (1).

547997621 is an equidigital number, since it uses as much as digits as its factorization.

547997621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 952560, while the sum is 50.

The square root of 547997621 is about 23409.3490084624. The cubic root of 547997621 is about 818.3257635069.

The spelling of 547997621 in words is "five hundred forty-seven million, nine hundred ninety-seven thousand, six hundred twenty-one".