491010047 has 4 divisors (see below), whose sum is σ = 535647336. Its totient is φ = 446372760.

The previous prime is 491010019. The next prime is 491010101. The reversal of 491010047 is 740010194.

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 491010047 - 2⁶ = 491009983 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 491009998 and 491010025.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491010007) 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 3 ways as a sum of consecutive naturals, for example, 22318628 + ... + 22318649.

It is an arithmetic number, because the mean of its divisors is an integer number (133911834).

Almost surely, 2^491010047 is an apocalyptic number.

491010047 is a deficient number, since it is larger than the sum of its proper divisors (44637289).

491010047 is a wasteful number, since it uses less digits than its factorization.

491010047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44637288.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 491010047 is about 22158.7465123820. The cubic root of 491010047 is about 788.9148413388.

The spelling of 491010047 in words is "four hundred ninety-one million, ten thousand, forty-seven".