491601843 has 24 divisors (see below), whose sum is σ = 728016432. Its totient is φ = 319491648.

The previous prime is 491601833. The next prime is 491601853. The reversal of 491601843 is 348106194.

491601843 is a `hidden beast` number, since 4 + 9 + 1 + 601 + 8 + 43 = 666.

It is an interprime number because it is at equal distance from previous prime (491601833) and next prime (491601853).

It is not a de Polignac number, because 491601843 - 2⁴ = 491601827 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 491601798 and 491601807.

It is not an unprimeable number, because it can be changed into a prime (491601833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 282805 + ... + 284537.

It is an arithmetic number, because the mean of its divisors is an integer number (30334018).

Almost surely, 2^491601843 is an apocalyptic number.

491601843 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

491601843 is a deficient number, since it is larger than the sum of its proper divisors (236414589).

491601843 is a wasteful number, since it uses less digits than its factorization.

491601843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2515 (or 2512 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 491601843 is about 22172.0960443527. The cubic root of 491601843 is about 789.2316639144.

The spelling of 491601843 in words is "four hundred ninety-one million, six hundred one thousand, eight hundred forty-three".