612661547 has 2 divisors, whose sum is σ = 612661548. Its totient is φ = 612661546.

The previous prime is 612661519. The next prime is 612661573. The reversal of 612661547 is 745166216.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 612661547 - 2¹⁰ = 612660523 is a prime.

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 612661547.

It is not a weakly prime, because it can be changed into another prime (612661507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306330773 + 306330774.

It is an arithmetic number, because the mean of its divisors is an integer number (306330774).

Almost surely, 2^612661547 is an apocalyptic number.

612661547 is a deficient number, since it is larger than the sum of its proper divisors (1).

612661547 is an equidigital number, since it uses as much as digits as its factorization.

612661547 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 38.

The square root of 612661547 is about 24752.0008686167. Note that the first 3 decimals coincide. The cubic root of 612661547 is about 849.3242828118.

The spelling of 612661547 in words is "six hundred twelve million, six hundred sixty-one thousand, five hundred forty-seven".