4991901 has 4 divisors (see below), whose sum is σ = 6655872. Its totient is φ = 3327932.

The previous prime is 4991893. The next prime is 4991923. The reversal of 4991901 is 1091994.

4991901 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4991901 - 2³ = 4991893 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4991951) 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, 831981 + ... + 831986.

It is an arithmetic number, because the mean of its divisors is an integer number (1663968).

Almost surely, 2^4991901 is an apocalyptic number.

It is an amenable number.

4991901 is a deficient number, since it is larger than the sum of its proper divisors (1663971).

4991901 is a wasteful number, since it uses less digits than its factorization.

4991901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1663970.

The product of its (nonzero) digits is 2916, while the sum is 33.

The square root of 4991901 is about 2234.2562520893. The cubic root of 4991901 is about 170.9052174709.

The spelling of 4991901 in words is "four million, nine hundred ninety-one thousand, nine hundred one".