427138273 has 2 divisors, whose sum is σ = 427138274. Its totient is φ = 427138272.

The previous prime is 427138223. The next prime is 427138279. The reversal of 427138273 is 372831724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 375700689 + 51437584 = 19383^2 + 7172^2 .

It is a cyclic number.

It is not a de Polignac number, because 427138273 - 2¹⁷ = 427007201 is a prime.

It is a super-2 number, since 2×427138273² = 364894208522845058, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (427138279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213569136 + 213569137.

It is an arithmetic number, because the mean of its divisors is an integer number (213569137).

Almost surely, 2^427138273 is an apocalyptic number.

It is an amenable number.

427138273 is a deficient number, since it is larger than the sum of its proper divisors (1).

427138273 is an equidigital number, since it uses as much as digits as its factorization.

427138273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 37.

The square root of 427138273 is about 20667.3237986925. The cubic root of 427138273 is about 753.1060950656.

Adding to 427138273 its reverse (372831724), we get a palindrome (799969997).

The spelling of 427138273 in words is "four hundred twenty-seven million, one hundred thirty-eight thousand, two hundred seventy-three".