494949861 has 24 divisors (see below), whose sum is σ = 823506944. Its totient is φ = 280596960.

The previous prime is 494949821. The next prime is 494949863. The reversal of 494949861 is 168949494.

It is a happy number.

494949861 is a `hidden beast` number, since 4 + 9 + 494 + 98 + 61 = 666.

It is not a de Polignac number, because 494949861 - 2⁶ = 494949797 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 494949798 and 494949807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (494949863) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22930 + ... + 38931.

Almost surely, 2^494949861 is an apocalyptic number.

It is an amenable number.

494949861 is a deficient number, since it is larger than the sum of its proper divisors (328557083).

494949861 is a wasteful number, since it uses less digits than its factorization.

494949861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62001 (or 61998 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 54.

The square root of 494949861 is about 22247.4686425220. The cubic root of 494949861 is about 791.0192798556.

The spelling of 494949861 in words is "four hundred ninety-four million, nine hundred forty-nine thousand, eight hundred sixty-one".