4787661 has 4 divisors (see below), whose sum is σ = 6383552. Its totient is φ = 3191772.

The previous prime is 4787647. The next prime is 4787669. The reversal of 4787661 is 1667874.

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 4787661 - 2⁶ = 4787597 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4787669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 797941 + ... + 797946.

It is an arithmetic number, because the mean of its divisors is an integer number (1595888).

Almost surely, 2^4787661 is an apocalyptic number.

It is an amenable number.

4787661 is a deficient number, since it is larger than the sum of its proper divisors (1595891).

4787661 is a wasteful number, since it uses less digits than its factorization.

4787661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1595890.

The product of its digits is 56448, while the sum is 39.

The square root of 4787661 is about 2188.0724393859. The cubic root of 4787661 is about 168.5418657546.

The spelling of 4787661 in words is "four million, seven hundred eighty-seven thousand, six hundred sixty-one".