423827891 has 2 divisors, whose sum is σ = 423827892. Its totient is φ = 423827890.

The previous prime is 423827869. The next prime is 423827903. The reversal of 423827891 is 198728324.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 423827891 - 2²² = 419633587 is a prime.

It is a super-4 number, since 4×423827891⁴ (a number of 36 digits) contains 4444 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (423827791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211913945 + 211913946.

It is an arithmetic number, because the mean of its divisors is an integer number (211913946).

Almost surely, 2^423827891 is an apocalyptic number.

423827891 is a deficient number, since it is larger than the sum of its proper divisors (1).

423827891 is an equidigital number, since it uses as much as digits as its factorization.

423827891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 44.

The square root of 423827891 is about 20587.0806818257. The cubic root of 423827891 is about 751.1554876243.

The spelling of 423827891 in words is "four hundred twenty-three million, eight hundred twenty-seven thousand, eight hundred ninety-one".