4671991 has 8 divisors (see below), whose sum is σ = 5068224. Its totient is φ = 4289280.

The previous prime is 4671983. The next prime is 4672001. The reversal of 4671991 is 1991764.

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

It is a cyclic number.

It is not a de Polignac number, because 4671991 - 2³ = 4671983 is a prime.

It is a Duffinian number.

4671991 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 4671991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4674991) 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, 2655 + ... + 4048.

It is an arithmetic number, because the mean of its divisors is an integer number (633528).

Almost surely, 2^4671991 is an apocalyptic number.

4671991 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

4671991 is a deficient number, since it is larger than the sum of its proper divisors (396233).

4671991 is a wasteful number, since it uses less digits than its factorization.

4671991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6761.

The product of its digits is 13608, while the sum is 37.

The square root of 4671991 is about 2161.4788918701. The cubic root of 4671991 is about 167.1734605091.

The spelling of 4671991 in words is "four million, six hundred seventy-one thousand, nine hundred ninety-one".