4311987 has 4 divisors (see below), whose sum is σ = 5749320. Its totient is φ = 2874656.

The previous prime is 4311977. The next prime is 4312003. The reversal of 4311987 is 7891134.

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 4311987 - 2¹⁰ = 4310963 is a prime.

It is a D-number.

4311987 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4311947) 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, 718662 + ... + 718667.

It is an arithmetic number, because the mean of its divisors is an integer number (1437330).

Almost surely, 2^4311987 is an apocalyptic number.

4311987 is a deficient number, since it is larger than the sum of its proper divisors (1437333).

4311987 is a wasteful number, since it uses less digits than its factorization.

4311987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1437332.

The product of its digits is 6048, while the sum is 33.

The square root of 4311987 is about 2076.5324461708. The cubic root of 4311987 is about 162.7642973181.

The spelling of 4311987 in words is "four million, three hundred eleven thousand, nine hundred eighty-seven".