491296997 has 8 divisors (see below), whose sum is σ = 520310976. Its totient is φ = 462920832.

The previous prime is 491296987. The next prime is 491297017. The reversal of 491296997 is 799692194.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-491296997 is a prime.

It is a super-2 number, since 2×491296997² = 482745478522436018, 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 (491296987) 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, 157868 + ... + 160949.

It is an arithmetic number, because the mean of its divisors is an integer number (65038872).

Almost surely, 2^491296997 is an apocalyptic number.

It is an amenable number.

491296997 is a deficient number, since it is larger than the sum of its proper divisors (29013979).

491296997 is a wasteful number, since it uses less digits than its factorization.

491296997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318907.

The product of its digits is 2204496, while the sum is 56.

The square root of 491296997 is about 22165.2204365307. The cubic root of 491296997 is about 789.0684940187.

The spelling of 491296997 in words is "four hundred ninety-one million, two hundred ninety-six thousand, nine hundred ninety-seven".