427641649 has 2 divisors, whose sum is σ = 427641650. Its totient is φ = 427641648.

The previous prime is 427641631. The next prime is 427641653. The reversal of 427641649 is 946146724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 424978225 + 2663424 = 20615^2 + 1632^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-427641649 is a prime.

It is not a weakly prime, because it can be changed into another prime (427641619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213820824 + 213820825.

It is an arithmetic number, because the mean of its divisors is an integer number (213820825).

Almost surely, 2^427641649 is an apocalyptic number.

It is an amenable number.

427641649 is a deficient number, since it is larger than the sum of its proper divisors (1).

427641649 is an equidigital number, since it uses as much as digits as its factorization.

427641649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 43.

The square root of 427641649 is about 20679.4982772794. The cubic root of 427641649 is about 753.4018203109.

The spelling of 427641649 in words is "four hundred twenty-seven million, six hundred forty-one thousand, six hundred forty-nine".