423541637 has 2 divisors, whose sum is σ = 423541638. Its totient is φ = 423541636.

The previous prime is 423541633. The next prime is 423541661. The reversal of 423541637 is 736145324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 223771681 + 199769956 = 14959^2 + 14134^2 .

It is a cyclic number.

It is not a de Polignac number, because 423541637 - 2² = 423541633 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 423541597 and 423541606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423541633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211770818 + 211770819.

It is an arithmetic number, because the mean of its divisors is an integer number (211770819).

Almost surely, 2^423541637 is an apocalyptic number.

It is an amenable number.

423541637 is a deficient number, since it is larger than the sum of its proper divisors (1).

423541637 is an equidigital number, since it uses as much as digits as its factorization.

423541637 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 35.

The square root of 423541637 is about 20580.1272347865. The cubic root of 423541637 is about 750.9863390192.

The spelling of 423541637 in words is "four hundred twenty-three million, five hundred forty-one thousand, six hundred thirty-seven".