491874783 has 4 divisors (see below), whose sum is σ = 655833048. Its totient is φ = 327916520.

The previous prime is 491874769. The next prime is 491874791. The reversal of 491874783 is 387478194.

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 491874783 - 2⁴ = 491874767 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491874703) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81979128 + ... + 81979133.

It is an arithmetic number, because the mean of its divisors is an integer number (163958262).

Almost surely, 2^491874783 is an apocalyptic number.

491874783 is a deficient number, since it is larger than the sum of its proper divisors (163958265).

491874783 is a wasteful number, since it uses less digits than its factorization.

491874783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163958264.

The product of its digits is 1354752, while the sum is 51.

The square root of 491874783 is about 22178.2502240371. The cubic root of 491874783 is about 789.3776987863.

The spelling of 491874783 in words is "four hundred ninety-one million, eight hundred seventy-four thousand, seven hundred eighty-three".