491029573 has 2 divisors, whose sum is σ = 491029574. Its totient is φ = 491029572.

The previous prime is 491029541. The next prime is 491029601. The reversal of 491029573 is 375920194.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 381889764 + 109139809 = 19542^2 + 10447^2 .

It is a cyclic number.

It is not a de Polignac number, because 491029573 - 2⁵ = 491029541 is a prime.

It is a super-2 number, since 2×491029573² = 482220083121124658, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (491029523) 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, 245514786 + 245514787.

It is an arithmetic number, because the mean of its divisors is an integer number (245514787).

Almost surely, 2^491029573 is an apocalyptic number.

It is an amenable number.

491029573 is a deficient number, since it is larger than the sum of its proper divisors (1).

491029573 is an equidigital number, since it uses as much as digits as its factorization.

491029573 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 491029573 is about 22159.1871015162. The cubic root of 491029573 is about 788.9252987942.

The spelling of 491029573 in words is "four hundred ninety-one million, twenty-nine thousand, five hundred seventy-three".