491654915 has 4 divisors (see below), whose sum is σ = 589985904. Its totient is φ = 393323928.

The previous prime is 491654897. The next prime is 491654939. The reversal of 491654915 is 519456194.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 491654915 - 2⁶ = 491654851 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49165487 + ... + 49165496.

It is an arithmetic number, because the mean of its divisors is an integer number (147496476).

Almost surely, 2^491654915 is an apocalyptic number.

491654915 is a deficient number, since it is larger than the sum of its proper divisors (98330989).

491654915 is an equidigital number, since it uses as much as digits as its factorization.

491654915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98330988.

The product of its digits is 194400, while the sum is 44.

The square root of 491654915 is about 22173.2928316928. The cubic root of 491654915 is about 789.2600639949.

The spelling of 491654915 in words is "four hundred ninety-one million, six hundred fifty-four thousand, nine hundred fifteen".