491105539 has 2 divisors, whose sum is σ = 491105540. Its totient is φ = 491105538.

The previous prime is 491105467. The next prime is 491105543. The reversal of 491105539 is 935501194.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 491105539 - 2⁷ = 491105411 is a prime.

It is equal to p_25911586 and since 491105539 and 25911586 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 491105498 and 491105507.

It is not a weakly prime, because it can be changed into another prime (491105599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245552769 + 245552770.

It is an arithmetic number, because the mean of its divisors is an integer number (245552770).

Almost surely, 2^491105539 is an apocalyptic number.

491105539 is a deficient number, since it is larger than the sum of its proper divisors (1).

491105539 is an equidigital number, since it uses as much as digits as its factorization.

491105539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24300, while the sum is 37.

The square root of 491105539 is about 22160.9011323998. The cubic root of 491105539 is about 788.9659809392.

It can be divided in two parts, 491 and 105539, that added together give a triangular number (106030 = T₄₆₀).

The spelling of 491105539 in words is "four hundred ninety-one million, one hundred five thousand, five hundred thirty-nine".