4372309 has 4 divisors (see below), whose sum is σ = 4411116. Its totient is φ = 4333504.

The previous prime is 4372307. The next prime is 4372321. The reversal of 4372309 is 9032734.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9032734 = 2 ⋅4516367.

It can be written as a sum of positive squares in 2 ways, for example, as 1633284 + 2739025 = 1278^2 + 1655^2 .

It is a cyclic number.

It is not a de Polignac number, because 4372309 - 2¹ = 4372307 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 (4372307) 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, 19234 + ... + 19459.

It is an arithmetic number, because the mean of its divisors is an integer number (1102779).

Almost surely, 2^4372309 is an apocalyptic number.

It is an amenable number.

4372309 is a deficient number, since it is larger than the sum of its proper divisors (38807).

4372309 is a wasteful number, since it uses less digits than its factorization.

4372309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38806.

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 4372309 is about 2091.0066953504. The cubic root of 4372309 is about 163.5197755292.

Subtracting from 4372309 its sum of digits (28), we obtain a square (4372281 = 2091²).

The spelling of 4372309 in words is "four million, three hundred seventy-two thousand, three hundred nine".