4722991 has 32 divisors (see below), whose sum is σ = 6386688. Its totient is φ = 3386880.

The previous prime is 4722979. The next prime is 4723021. The reversal of 4722991 is 1992274.

4722991 = T₆₈ + T₆₉ + ... + T₃₀₅.

It is a happy number.

It is not a de Polignac number, because 4722991 - 2⁵ = 4722959 is a prime.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4722931) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66486 + ... + 66556.

It is an arithmetic number, because the mean of its divisors is an integer number (199584).

Almost surely, 2^4722991 is an apocalyptic number.

4722991 is a deficient number, since it is larger than the sum of its proper divisors (1663697).

4722991 is a wasteful number, since it uses less digits than its factorization.

4722991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151.

The product of its digits is 9072, while the sum is 34.

The square root of 4722991 is about 2173.2443488941. The cubic root of 4722991 is about 167.7795554425.

The spelling of 4722991 in words is "four million, seven hundred twenty-two thousand, nine hundred ninety-one".