427665541 has 2 divisors, whose sum is σ = 427665542. Its totient is φ = 427665540.

The previous prime is 427665517. The next prime is 427665569. The reversal of 427665541 is 145566724.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 389904516 + 37761025 = 19746^2 + 6145^2 .

It is a cyclic number.

It is not a de Polignac number, because 427665541 - 2¹⁷ = 427534469 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 427665494 and 427665503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (427665341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213832770 + 213832771.

It is an arithmetic number, because the mean of its divisors is an integer number (213832771).

Almost surely, 2^427665541 is an apocalyptic number.

It is an amenable number.

427665541 is a deficient number, since it is larger than the sum of its proper divisors (1).

427665541 is an equidigital number, since it uses as much as digits as its factorization.

427665541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 201600, while the sum is 40.

The square root of 427665541 is about 20680.0759428006. The cubic root of 427665541 is about 753.4158507038.

The spelling of 427665541 in words is "four hundred twenty-seven million, six hundred sixty-five thousand, five hundred forty-one".