612553481 has 2 divisors, whose sum is σ = 612553482. Its totient is φ = 612553480.

The previous prime is 612553429. The next prime is 612553523. The reversal of 612553481 is 184355216.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 498405625 + 114147856 = 22325^2 + 10684^2 .

It is a cyclic number.

It is not a de Polignac number, because 612553481 - 2²⁶ = 545444617 is a prime.

It is a super-2 number, since 2×612553481² = 750443534170434722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (612553421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306276740 + 306276741.

It is an arithmetic number, because the mean of its divisors is an integer number (306276741).

Almost surely, 2^612553481 is an apocalyptic number.

It is an amenable number.

612553481 is a deficient number, since it is larger than the sum of its proper divisors (1).

612553481 is an equidigital number, since it uses as much as digits as its factorization.

612553481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28800, while the sum is 35.

The square root of 612553481 is about 24749.8177973091. The cubic root of 612553481 is about 849.2743430719.

The spelling of 612553481 in words is "six hundred twelve million, five hundred fifty-three thousand, four hundred eighty-one".