454187561 has 2 divisors, whose sum is σ = 454187562. Its totient is φ = 454187560.

The previous prime is 454187507. The next prime is 454187579. The reversal of 454187561 is 165781454.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 398401600 + 55785961 = 19960^2 + 7469^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-454187561 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (454184561) 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, 227093780 + 227093781.

It is an arithmetic number, because the mean of its divisors is an integer number (227093781).

Almost surely, 2^454187561 is an apocalyptic number.

It is an amenable number.

454187561 is a deficient number, since it is larger than the sum of its proper divisors (1).

454187561 is an equidigital number, since it uses as much as digits as its factorization.

454187561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 134400, while the sum is 41.

The square root of 454187561 is about 21311.6766351219. The cubic root of 454187561 is about 768.6791099855.

The spelling of 454187561 in words is "four hundred fifty-four million, one hundred eighty-seven thousand, five hundred sixty-one".