4923991 has 8 divisors (see below), whose sum is σ = 5030720. Its totient is φ = 4818528.

The previous prime is 4923979. The next prime is 4924013. The reversal of 4923991 is 1993294.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4923991 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4923991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4923901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12205 + ... + 12601.

It is an arithmetic number, because the mean of its divisors is an integer number (628840).

Almost surely, 2^4923991 is an apocalyptic number.

4923991 is a deficient number, since it is larger than the sum of its proper divisors (106729).

4923991 is a wasteful number, since it uses less digits than its factorization.

4923991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633.

The product of its digits is 17496, while the sum is 37.

The square root of 4923991 is about 2219.0067597914. The cubic root of 4923991 is about 170.1266760564.

The spelling of 4923991 in words is "four million, nine hundred twenty-three thousand, nine hundred ninety-one".