427285990393 has 2 divisors, whose sum is σ = 427285990394. Its totient is φ = 427285990392.

The previous prime is 427285990363. The next prime is 427285990399. The reversal of 427285990393 is 393099582724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 418768177129 + 8517813264 = 647123^2 + 92292^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-427285990393 is a prime.

It is a super-2 number, since 2×427285990393² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (427285990399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213642995196 + 213642995197.

It is an arithmetic number, because the mean of its divisors is an integer number (213642995197).

Almost surely, 2^427285990393 is an apocalyptic number.

It is an amenable number.

427285990393 is a deficient number, since it is larger than the sum of its proper divisors (1).

427285990393 is an equidigital number, since it uses as much as digits as its factorization.

427285990393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29393280, while the sum is 61.

The spelling of 427285990393 in words is "four hundred twenty-seven billion, two hundred eighty-five million, nine hundred ninety thousand, three hundred ninety-three".