4947861 has 4 divisors (see below), whose sum is σ = 6597152. Its totient is φ = 3298572.

The previous prime is 4947857. The next prime is 4947863. The reversal of 4947861 is 1687494.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 4947861 - 2² = 4947857 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4947863) 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, 824641 + ... + 824646.

It is an arithmetic number, because the mean of its divisors is an integer number (1649288).

Almost surely, 2^4947861 is an apocalyptic number.

It is an amenable number.

4947861 is a deficient number, since it is larger than the sum of its proper divisors (1649291).

4947861 is a wasteful number, since it uses less digits than its factorization.

4947861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1649290.

The product of its digits is 48384, while the sum is 39.

The square root of 4947861 is about 2224.3787896849. The cubic root of 4947861 is about 170.4011403635.

The spelling of 4947861 in words is "four million, nine hundred forty-seven thousand, eight hundred sixty-one".