655257149 has 2 divisors, whose sum is σ = 655257150. Its totient is φ = 655257148.

The previous prime is 655257139. The next prime is 655257167. The reversal of 655257149 is 941752556.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 373185124 + 282072025 = 19318^2 + 16795^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-655257149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (655257139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327628574 + 327628575.

It is an arithmetic number, because the mean of its divisors is an integer number (327628575).

Almost surely, 2^655257149 is an apocalyptic number.

It is an amenable number.

655257149 is a deficient number, since it is larger than the sum of its proper divisors (1).

655257149 is an equidigital number, since it uses as much as digits as its factorization.

655257149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 378000, while the sum is 44.

The square root of 655257149 is about 25597.9911125854. The cubic root of 655257149 is about 868.5681953878.

The spelling of 655257149 in words is "six hundred fifty-five million, two hundred fifty-seven thousand, one hundred forty-nine".