427309873 has 2 divisors, whose sum is σ = 427309874. Its totient is φ = 427309872.

The previous prime is 427309837. The next prime is 427309951. The reversal of 427309873 is 378903724.

Together with previous prime (427309837) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 271359729 + 155950144 = 16473^2 + 12488^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-427309873 is a prime.

It is a super-2 number, since 2×427309873² = 365187455126552258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (427309823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213654936 + 213654937.

It is an arithmetic number, because the mean of its divisors is an integer number (213654937).

Almost surely, 2^427309873 is an apocalyptic number.

It is an amenable number.

427309873 is a deficient number, since it is larger than the sum of its proper divisors (1).

427309873 is an equidigital number, since it uses as much as digits as its factorization.

427309873 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 254016, while the sum is 43.

The square root of 427309873 is about 20671.4748627184. The cubic root of 427309873 is about 753.2069333747.

The spelling of 427309873 in words is "four hundred twenty-seven million, three hundred nine thousand, eight hundred seventy-three".