909971 has 2 divisors, whose sum is σ = 909972. Its totient is φ = 909970.

The previous prime is 909917. The next prime is 909973. The reversal of 909971 is 179909.

It is a happy number.

Together with previous prime (909917) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (179909) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 909971 - 2⁶ = 909907 is a prime.

Together with 909973, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (909973) 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, 454985 + 454986.

It is an arithmetic number, because the mean of its divisors is an integer number (454986).

2⁹⁰⁹⁹⁷¹ is an apocalyptic number.

909971 is a deficient number, since it is larger than the sum of its proper divisors (1).

909971 is an equidigital number, since it uses as much as digits as its factorization.

909971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5103, while the sum is 35.

The square root of 909971 is about 953.9240011657. The cubic root of 909971 is about 96.9041814274.

The spelling of 909971 in words is "nine hundred nine thousand, nine hundred seventy-one".