491027797 has 8 divisors (see below), whose sum is σ = 547034040. Its totient is φ = 437626560.

The previous prime is 491027783. The next prime is 491027807. The reversal of 491027797 is 797720194.

It can be written as a sum of positive squares in 4 ways, for example, as 46703556 + 444324241 = 6834^2 + 21079^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 491027797 - 2¹⁹ = 490503509 is a prime.

It is a super-2 number, since 2×491027797² = 482216594853346418, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491027737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 650854 + ... + 651607.

It is an arithmetic number, because the mean of its divisors is an integer number (68379255).

Almost surely, 2^491027797 is an apocalyptic number.

It is an amenable number.

491027797 is a deficient number, since it is larger than the sum of its proper divisors (56006243).

491027797 is a wasteful number, since it uses less digits than its factorization.

491027797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1302503.

The product of its (nonzero) digits is 222264, while the sum is 46.

The square root of 491027797 is about 22159.1470278077. The cubic root of 491027797 is about 788.9243476410.

The spelling of 491027797 in words is "four hundred ninety-one million, twenty-seven thousand, seven hundred ninety-seven".