4989091 has 4 divisors (see below), whose sum is σ = 5206032. Its totient is φ = 4772152.

The previous prime is 4989079. The next prime is 4989107. The reversal of 4989091 is 1909894.

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 4989091 - 2⁹ = 4988579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4989991) 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, 108436 + ... + 108481.

It is an arithmetic number, because the mean of its divisors is an integer number (1301508).

Almost surely, 2^4989091 is an apocalyptic number.

4989091 is a deficient number, since it is larger than the sum of its proper divisors (216941).

4989091 is a wasteful number, since it uses less digits than its factorization.

4989091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216940.

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 4989091 is about 2233.6273189590. The cubic root of 4989091 is about 170.8731432637.

The spelling of 4989091 in words is "four million, nine hundred eighty-nine thousand, ninety-one".