5091987 has 8 divisors (see below), whose sum is σ = 6838720. Its totient is φ = 3369960.

The previous prime is 5091973. The next prime is 5091991. The reversal of 5091987 is 7891905.

It is a happy number.

5091987 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 5091987 - 2⁶ = 5091923 is a prime.

It is a Duffinian number.

5091987 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (5091937) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5689 + ... + 6522.

It is an arithmetic number, because the mean of its divisors is an integer number (854840).

Almost surely, 2^5091987 is an apocalyptic number.

5091987 is a deficient number, since it is larger than the sum of its proper divisors (1746733).

5091987 is a wasteful number, since it uses less digits than its factorization.

5091987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12353.

The product of its (nonzero) digits is 22680, while the sum is 39.

The square root of 5091987 is about 2256.5431527006. The cubic root of 5091987 is about 172.0398659170.

The spelling of 5091987 in words is "five million, ninety-one thousand, nine hundred eighty-seven".