427944930649 has 2 divisors, whose sum is σ = 427944930650. Its totient is φ = 427944930648.

The previous prime is 427944930571. The next prime is 427944930683. The reversal of 427944930649 is 946039449724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 306286978624 + 121657952025 = 553432^2 + 348795^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-427944930649 is a prime.

It is a super-2 number, since 2×427944930649² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (427941930649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213972465324 + 213972465325.

It is an arithmetic number, because the mean of its divisors is an integer number (213972465325).

Almost surely, 2^427944930649 is an apocalyptic number.

It is an amenable number.

427944930649 is a deficient number, since it is larger than the sum of its proper divisors (1).

427944930649 is an equidigital number, since it uses as much as digits as its factorization.

427944930649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 47029248, while the sum is 61.

The spelling of 427944930649 in words is "four hundred twenty-seven billion, nine hundred forty-four million, nine hundred thirty thousand, six hundred forty-nine".