4991345 has 8 divisors (see below), whose sum is σ = 6250176. Its totient is φ = 3819376.

The previous prime is 4991339. The next prime is 4991347. The reversal of 4991345 is 5431994.

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 4991345 - 2²⁰ = 3942769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4991347) 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, 21587 + ... + 21816.

It is an arithmetic number, because the mean of its divisors is an integer number (781272).

Almost surely, 2^4991345 is an apocalyptic number.

It is an amenable number.

4991345 is a deficient number, since it is larger than the sum of its proper divisors (1258831).

4991345 is a wasteful number, since it uses less digits than its factorization.

4991345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43431.

The product of its digits is 19440, while the sum is 35.

The square root of 4991345 is about 2234.1318224313. The cubic root of 4991345 is about 170.8988720707.

The spelling of 4991345 in words is "four million, nine hundred ninety-one thousand, three hundred forty-five".