4903991 has 4 divisors (see below), whose sum is σ = 5117232. Its totient is φ = 4690752.

The previous prime is 4903981. The next prime is 4903999. The reversal of 4903991 is 1993094.

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 4903991 - 2¹⁰ = 4902967 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4903999) 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, 106586 + ... + 106631.

It is an arithmetic number, because the mean of its divisors is an integer number (1279308).

Almost surely, 2^4903991 is an apocalyptic number.

4903991 is a deficient number, since it is larger than the sum of its proper divisors (213241).

4903991 is a wasteful number, since it uses less digits than its factorization.

4903991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213240.

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 4903991 is about 2214.4956536422. The cubic root of 4903991 is about 169.8960263871.

The spelling of 4903991 in words is "four million, nine hundred three thousand, nine hundred ninety-one".