423931061 has 2 divisors, whose sum is σ = 423931062. Its totient is φ = 423931060.

The previous prime is 423930977. The next prime is 423931063. The reversal of 423931061 is 160139324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 289510225 + 134420836 = 17015^2 + 11594^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423931061 is a prime.

It is a Sophie Germain prime.

Together with 423931063, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423931063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211965530 + 211965531.

It is an arithmetic number, because the mean of its divisors is an integer number (211965531).

Almost surely, 2^423931061 is an apocalyptic number.

It is an amenable number.

423931061 is a deficient number, since it is larger than the sum of its proper divisors (1).

423931061 is an equidigital number, since it uses as much as digits as its factorization.

423931061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 423931061 is about 20589.5862270226. The cubic root of 423931061 is about 751.2164325078.

The spelling of 423931061 in words is "four hundred twenty-three million, nine hundred thirty-one thousand, sixty-one".