612055621 has 2 divisors, whose sum is σ = 612055622. Its totient is φ = 612055620.

The previous prime is 612055589. The next prime is 612055627. The reversal of 612055621 is 126550216.

612055621 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., 541260225 + 70795396 = 23265^2 + 8414^2 .

It is a cyclic number.

It is not a de Polignac number, because 612055621 - 2⁵ = 612055589 is a prime.

It is a super-2 number, since 2×612055621² = 749224166395391282, which contains 22 as substring.

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 612055621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (612055627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306027810 + 306027811.

It is an arithmetic number, because the mean of its divisors is an integer number (306027811).

Almost surely, 2^612055621 is an apocalyptic number.

It is an amenable number.

612055621 is a deficient number, since it is larger than the sum of its proper divisors (1).

612055621 is an equidigital number, since it uses as much as digits as its factorization.

612055621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 612055621 is about 24739.7579009981. The cubic root of 612055621 is about 849.0441948264.

The spelling of 612055621 in words is "six hundred twelve million, fifty-five thousand, six hundred twenty-one".