130177561 has 2 divisors, whose sum is σ = 130177562. Its totient is φ = 130177560.

The previous prime is 130177559. The next prime is 130177573. The reversal of 130177561 is 165771031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77528025 + 52649536 = 8805^2 + 7256^2 .

It is an emirp because it is prime and its reverse (165771031) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 130177561 - 2¹ = 130177559 is a prime.

Together with 130177559, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (130177511) 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, 65088780 + 65088781.

It is an arithmetic number, because the mean of its divisors is an integer number (65088781).

Almost surely, 2^130177561 is an apocalyptic number.

It is an amenable number.

130177561 is a deficient number, since it is larger than the sum of its proper divisors (1).

130177561 is an equidigital number, since it uses as much as digits as its factorization.

130177561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4410, while the sum is 31.

The square root of 130177561 is about 11409.5381589265. The cubic root of 130177561 is about 506.8102349285.

The spelling of 130177561 in words is "one hundred thirty million, one hundred seventy-seven thousand, five hundred sixty-one".