4309681 has 4 divisors (see below), whose sum is σ = 4321792. Its totient is φ = 4297572.

The previous prime is 4309673. The next prime is 4309693. The reversal of 4309681 is 1869034.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1869034 = 2 ⋅934517.

It is a cyclic number.

It is not a de Polignac number, because 4309681 - 2³ = 4309673 is a prime.

It is a super-2 number, since 2×4309681² = 37146700643522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (4309621) 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, 5505 + ... + 6238.

It is an arithmetic number, because the mean of its divisors is an integer number (1080448).

Almost surely, 2^4309681 is an apocalyptic number.

It is an amenable number.

4309681 is a deficient number, since it is larger than the sum of its proper divisors (12111).

4309681 is a wasteful number, since it uses less digits than its factorization.

4309681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12110.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 4309681 is about 2075.9771193344. The cubic root of 4309681 is about 162.7352773328.

The spelling of 4309681 in words is "four million, three hundred nine thousand, six hundred eighty-one".