451061647 has 2 divisors, whose sum is σ = 451061648. Its totient is φ = 451061646.

The previous prime is 451061609. The next prime is 451061659. The reversal of 451061647 is 746160154.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-451061647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (451061047) 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, 225530823 + 225530824.

It is an arithmetic number, because the mean of its divisors is an integer number (225530824).

Almost surely, 2^451061647 is an apocalyptic number.

451061647 is a deficient number, since it is larger than the sum of its proper divisors (1).

451061647 is an equidigital number, since it uses as much as digits as its factorization.

451061647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 451061647 is about 21238.2119539287. The cubic root of 451061647 is about 766.9115888137.

The spelling of 451061647 in words is "four hundred fifty-one million, sixty-one thousand, six hundred forty-seven".