423848921 has 2 divisors, whose sum is σ = 423848922. Its totient is φ = 423848920.

The previous prime is 423848863. The next prime is 423848933. The reversal of 423848921 is 129848324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 345774025 + 78074896 = 18595^2 + 8836^2 .

It is a cyclic number.

It is not a de Polignac number, because 423848921 - 2²² = 419654617 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (423848951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211924460 + 211924461.

It is an arithmetic number, because the mean of its divisors is an integer number (211924461).

Almost surely, 2^423848921 is an apocalyptic number.

It is an amenable number.

423848921 is a deficient number, since it is larger than the sum of its proper divisors (1).

423848921 is an equidigital number, since it uses as much as digits as its factorization.

423848921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 110592, while the sum is 41.

The square root of 423848921 is about 20587.5914327053. The cubic root of 423848921 is about 751.1679113298.

The spelling of 423848921 in words is "four hundred twenty-three million, eight hundred forty-eight thousand, nine hundred twenty-one".