4890991 has 4 divisors (see below), whose sum is σ = 5589712. Its totient is φ = 4192272.

The previous prime is 4890983. The next prime is 4891001. The reversal of 4890991 is 1990984.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 4890991 - 2³ = 4890983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4890911) 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, 349350 + ... + 349363.

It is an arithmetic number, because the mean of its divisors is an integer number (1397428).

Almost surely, 2^4890991 is an apocalyptic number.

4890991 is a deficient number, since it is larger than the sum of its proper divisors (698721).

4890991 is an equidigital number, since it uses as much as digits as its factorization.

4890991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698720.

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

The square root of 4890991 is about 2211.5585002437. The cubic root of 4890991 is about 169.7457676245.

The spelling of 4890991 in words is "four million, eight hundred ninety thousand, nine hundred ninety-one".