428637941 has 2 divisors, whose sum is σ = 428637942. Its totient is φ = 428637940.

The previous prime is 428637931. The next prime is 428637943. The reversal of 428637941 is 149736824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 369024100 + 59613841 = 19210^2 + 7721^2 .

It is a cyclic number.

It is not a de Polignac number, because 428637941 - 2⁶ = 428637877 is a prime.

Together with 428637943, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 428637892 and 428637901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428637943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214318970 + 214318971.

It is an arithmetic number, because the mean of its divisors is an integer number (214318971).

Almost surely, 2^428637941 is an apocalyptic number.

It is an amenable number.

428637941 is a deficient number, since it is larger than the sum of its proper divisors (1).

428637941 is an equidigital number, since it uses as much as digits as its factorization.

428637941 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 44.

The square root of 428637941 is about 20703.5731457157. The cubic root of 428637941 is about 753.9864422369.

The spelling of 428637941 in words is "four hundred twenty-eight million, six hundred thirty-seven thousand, nine hundred forty-one".