4899721 has 4 divisors (see below), whose sum is σ = 5013712. Its totient is φ = 4785732.

The previous prime is 4899683. The next prime is 4899733. The reversal of 4899721 is 1279984.

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 4899721 - 2⁷ = 4899593 is a prime.

It is a Duffinian number.

4899721 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4899121) 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, 56931 + ... + 57016.

It is an arithmetic number, because the mean of its divisors is an integer number (1253428).

Almost surely, 2^4899721 is an apocalyptic number.

It is an amenable number.

4899721 is a deficient number, since it is larger than the sum of its proper divisors (113991).

4899721 is a wasteful number, since it uses less digits than its factorization.

4899721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113990.

The product of its digits is 36288, while the sum is 40.

The square root of 4899721 is about 2213.5313415445. The cubic root of 4899721 is about 169.8467014807.

The spelling of 4899721 in words is "four million, eight hundred ninety-nine thousand, seven hundred twenty-one".