427859891 has 2 divisors, whose sum is σ = 427859892. Its totient is φ = 427859890.

The previous prime is 427859863. The next prime is 427859899. The reversal of 427859891 is 198958724.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-427859891 is a prime.

It is not a weakly prime, because it can be changed into another prime (427859899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213929945 + 213929946.

It is an arithmetic number, because the mean of its divisors is an integer number (213929946).

Almost surely, 2^427859891 is an apocalyptic number.

427859891 is a deficient number, since it is larger than the sum of its proper divisors (1).

427859891 is an equidigital number, since it uses as much as digits as its factorization.

427859891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1451520, while the sum is 53.

The square root of 427859891 is about 20684.7743763378. The cubic root of 427859891 is about 753.5299618345.

The spelling of 427859891 in words is "four hundred twenty-seven million, eight hundred fifty-nine thousand, eight hundred ninety-one".