1427908021 has 2 divisors, whose sum is σ = 1427908022. Its totient is φ = 1427908020.

The previous prime is 1427907977. The next prime is 1427908039. The reversal of 1427908021 is 1208097241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1397712996 + 30195025 = 37386^2 + 5495^2 .

It is a cyclic number.

It is not a de Polignac number, because 1427908021 - 2¹³ = 1427899829 is a prime.

It is a super-2 number, since 2×1427908021² = 4077842632872272882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1427908091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 713954010 + 713954011.

It is an arithmetic number, because the mean of its divisors is an integer number (713954011).

Almost surely, 2^1427908021 is an apocalyptic number.

It is an amenable number.

1427908021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1427908021 is an equidigital number, since it uses as much as digits as its factorization.

1427908021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 1427908021 is about 37787.6702245587. The cubic root of 1427908021 is about 1126.0735157967.

The spelling of 1427908021 in words is "one billion, four hundred twenty-seven million, nine hundred eight thousand, twenty-one".