491010973 has 2 divisors, whose sum is σ = 491010974. Its totient is φ = 491010972.

The previous prime is 491010959. The next prime is 491011013. The reversal of 491010973 is 379010194.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 382476249 + 108534724 = 19557^2 + 10418^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-491010973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (491010913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245505486 + 245505487.

It is an arithmetic number, because the mean of its divisors is an integer number (245505487).

Almost surely, 2^491010973 is an apocalyptic number.

It is an amenable number.

491010973 is a deficient number, since it is larger than the sum of its proper divisors (1).

491010973 is an equidigital number, since it uses as much as digits as its factorization.

491010973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 491010973 is about 22158.7674070558. The cubic root of 491010973 is about 788.9153372788.

The spelling of 491010973 in words is "four hundred ninety-one million, ten thousand, nine hundred seventy-three".