4689987 has 4 divisors (see below), whose sum is σ = 6253320. Its totient is φ = 3126656.

The previous prime is 4689973. The next prime is 4689991. The reversal of 4689987 is 7899864.

It is a happy number.

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 4689987 - 2⁷ = 4689859 is a prime.

It is an Ulam number.

It is a D-number.

4689987 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4689947) 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, 781662 + ... + 781667.

It is an arithmetic number, because the mean of its divisors is an integer number (1563330).

Almost surely, 2^4689987 is an apocalyptic number.

4689987 is a deficient number, since it is larger than the sum of its proper divisors (1563333).

4689987 is a wasteful number, since it uses less digits than its factorization.

4689987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1563332.

The product of its digits is 870912, while the sum is 51.

The square root of 4689987 is about 2165.6377813476. The cubic root of 4689987 is about 167.3878301498.

The spelling of 4689987 in words is "four million, six hundred eighty-nine thousand, nine hundred eighty-seven".