4306991 has 4 divisors (see below), whose sum is σ = 4638312. Its totient is φ = 3975672.

The previous prime is 4306987. The next prime is 4306999. The reversal of 4306991 is 1996034.

Added to its reverse (1996034) it gives a triangular number (6303025 = T₃₅₅₀).

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1996034 = 2 ⋅998017.

It is a cyclic number.

It is not a de Polignac number, because 4306991 - 2² = 4306987 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 (4306999) 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, 165641 + ... + 165666.

It is an arithmetic number, because the mean of its divisors is an integer number (1159578).

Almost surely, 2^4306991 is an apocalyptic number.

4306991 is a deficient number, since it is larger than the sum of its proper divisors (331321).

4306991 is a wasteful number, since it uses less digits than its factorization.

4306991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331320.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 4306991 is about 2075.3291305236. The cubic root of 4306991 is about 162.7014117940.

Adding to 4306991 its reverse (1996034), we get a triangular number (6303025 = T₃₅₅₀).

The spelling of 4306991 in words is "four million, three hundred six thousand, nine hundred ninety-one".