545713621 has 2 divisors, whose sum is σ = 545713622. Its totient is φ = 545713620.

The previous prime is 545713601. The next prime is 545713633. The reversal of 545713621 is 126317545.

545713621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 298909521 + 246804100 = 17289^2 + 15710^2 .

It is a cyclic number.

It is not a de Polignac number, because 545713621 - 2⁹ = 545713109 is a prime.

It is a super-2 number, since 2×545713621² = 595606712289863282, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (545713601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272856810 + 272856811.

It is an arithmetic number, because the mean of its divisors is an integer number (272856811).

Almost surely, 2^545713621 is an apocalyptic number.

It is an amenable number.

545713621 is a deficient number, since it is larger than the sum of its proper divisors (1).

545713621 is an equidigital number, since it uses as much as digits as its factorization.

545713621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25200, while the sum is 34.

The square root of 545713621 is about 23360.5141424584. The cubic root of 545713621 is about 817.1872800039.

The spelling of 545713621 in words is "five hundred forty-five million, seven hundred thirteen thousand, six hundred twenty-one".