4721399 has 4 divisors (see below), whose sum is σ = 4810536. Its totient is φ = 4632264.

The previous prime is 4721383. The next prime is 4721407. The reversal of 4721399 is 9931274.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9931274 = 2 ⋅4965637.

It is a cyclic number.

It is not a de Polignac number, because 4721399 - 2⁴ = 4721383 is a prime.

It is a d-powerful number, because it can be written as 4¹¹ + 7⁴ + 2¹⁹ + 1 + 3⁵ + 9² + 9² .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4721369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44489 + ... + 44594.

It is an arithmetic number, because the mean of its divisors is an integer number (1202634).

Almost surely, 2^4721399 is an apocalyptic number.

4721399 is a deficient number, since it is larger than the sum of its proper divisors (89137).

4721399 is an equidigital number, since it uses as much as digits as its factorization.

4721399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89136.

The product of its digits is 13608, while the sum is 35.

The square root of 4721399 is about 2172.8780453583. The cubic root of 4721399 is about 167.7607019187.

The spelling of 4721399 in words is "four million, seven hundred twenty-one thousand, three hundred ninety-nine".