491413969 has 8 divisors (see below), whose sum is σ = 493371648. Its totient is φ = 489461280.

The previous prime is 491413963. The next prime is 491413991. The reversal of 491413969 is 969314194.

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 491413969 - 2²⁵ = 457859537 is a prime.

It is a super-2 number, since 2×491413969² = 482975377856665922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (491413963) 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, 398584 + ... + 399814.

It is an arithmetic number, because the mean of its divisors is an integer number (61671456).

Almost surely, 2^491413969 is an apocalyptic number.

It is an amenable number.

491413969 is a deficient number, since it is larger than the sum of its proper divisors (1957679).

491413969 is a wasteful number, since it uses less digits than its factorization.

491413969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2495.

The product of its digits is 209952, while the sum is 46.

The square root of 491413969 is about 22167.8589178116. The cubic root of 491413969 is about 789.1311116725.

The spelling of 491413969 in words is "four hundred ninety-one million, four hundred thirteen thousand, nine hundred sixty-nine".