909541 has 2 divisors, whose sum is σ = 909542. Its totient is φ = 909540.

The previous prime is 909539. The next prime is 909547. The reversal of 909541 is 145909.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 772641 + 136900 = 879^2 + 370^2 .

It is a cyclic number.

It is not a de Polignac number, because 909541 - 2¹ = 909539 is a prime.

Together with 909539, it forms a pair of twin primes.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (909547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 454770 + 454771.

It is an arithmetic number, because the mean of its divisors is an integer number (454771).

2⁹⁰⁹⁵⁴¹ is an apocalyptic number.

It is an amenable number.

909541 is a deficient number, since it is larger than the sum of its proper divisors (1).

909541 is an equidigital number, since it uses as much as digits as its factorization.

909541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 909541 is about 953.6985897022. The cubic root of 909541 is about 96.8889152401. Note that the first 3 decimals are identical.

The spelling of 909541 in words is "nine hundred nine thousand, five hundred forty-one".