4990191 has 4 divisors (see below), whose sum is σ = 6653592. Its totient is φ = 3326792.

The previous prime is 4990189. The next prime is 4990199. The reversal of 4990191 is 1910994.

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 4990191 - 2¹ = 4990189 is a prime.

It is an Ulam number.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4990199) 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, 831696 + ... + 831701.

It is an arithmetic number, because the mean of its divisors is an integer number (1663398).

Almost surely, 2^4990191 is an apocalyptic number.

4990191 is a deficient number, since it is larger than the sum of its proper divisors (1663401).

4990191 is a wasteful number, since it uses less digits than its factorization.

4990191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1663400.

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

The square root of 4990191 is about 2233.8735416312. The cubic root of 4990191 is about 170.8857004373.

The spelling of 4990191 in words is "four million, nine hundred ninety thousand, one hundred ninety-one".