1427664401 has 2 divisors, whose sum is σ = 1427664402. Its totient is φ = 1427664400.

The previous prime is 1427664373. The next prime is 1427664409. The reversal of 1427664401 is 1044667241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 735711376 + 691953025 = 27124^2 + 26305^2 .

It is a cyclic number.

It is not a de Polignac number, because 1427664401 - 2³⁰ = 353922577 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1427664409) 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, 713832200 + 713832201.

It is an arithmetic number, because the mean of its divisors is an integer number (713832201).

Almost surely, 2^1427664401 is an apocalyptic number.

It is an amenable number.

1427664401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1427664401 is an equidigital number, since it uses as much as digits as its factorization.

1427664401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 1427664401 is about 37784.4465488116. The cubic root of 1427664401 is about 1126.0094711410.

The spelling of 1427664401 in words is "one billion, four hundred twenty-seven million, six hundred sixty-four thousand, four hundred one".