612905149 has 2 divisors, whose sum is σ = 612905150. Its totient is φ = 612905148.

The previous prime is 612905141. The next prime is 612905159. The reversal of 612905149 is 941509216.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 597460249 + 15444900 = 24443^2 + 3930^2 .

It is a cyclic number.

It is not a de Polignac number, because 612905149 - 2³ = 612905141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (612905141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306452574 + 306452575.

It is an arithmetic number, because the mean of its divisors is an integer number (306452575).

Almost surely, 2^612905149 is an apocalyptic number.

It is an amenable number.

612905149 is a deficient number, since it is larger than the sum of its proper divisors (1).

612905149 is an equidigital number, since it uses as much as digits as its factorization.

612905149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 612905149 is about 24756.9212342731. The cubic root of 612905149 is about 849.4368352639.

The spelling of 612905149 in words is "six hundred twelve million, nine hundred five thousand, one hundred forty-nine".