491039 has 2 divisors, whose sum is σ = 491040. Its totient is φ = 491038.

The previous prime is 491003. The next prime is 491041. The reversal of 491039 is 930194.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 491039 - 2⁸ = 490783 is a prime.

It is a super-2 number, since 2×491039² = 482238599042, which contains 22 as substring.

Together with 491041, 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 = 490999 and 491017.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (491059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245519 + 245520.

It is an arithmetic number, because the mean of its divisors is an integer number (245520).

2⁴⁹¹⁰³⁹ is an apocalyptic number.

491039 is a deficient number, since it is larger than the sum of its proper divisors (1).

491039 is an equidigital number, since it uses as much as digits as its factorization.

491039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 491039 is about 700.7417498622. The cubic root of 491039 is about 78.8930347473.

The spelling of 491039 in words is "four hundred ninety-one thousand, thirty-nine".