427051997 has 2 divisors, whose sum is σ = 427051998. Its totient is φ = 427051996.

The previous prime is 427051957. The next prime is 427052027. The reversal of 427051997 is 799150724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 353966596 + 73085401 = 18814^2 + 8549^2 .

It is a cyclic number.

It is not a de Polignac number, because 427051997 - 2²⁰ = 426003421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (427051907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213525998 + 213525999.

It is an arithmetic number, because the mean of its divisors is an integer number (213525999).

Almost surely, 2^427051997 is an apocalyptic number.

It is an amenable number.

427051997 is a deficient number, since it is larger than the sum of its proper divisors (1).

427051997 is an equidigital number, since it uses as much as digits as its factorization.

427051997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 158760, while the sum is 44.

The square root of 427051997 is about 20665.2364370699. The cubic root of 427051997 is about 753.0553859933.

The spelling of 427051997 in words is "four hundred twenty-seven million, fifty-one thousand, nine hundred ninety-seven".