4539947 has 4 divisors (see below), whose sum is σ = 4737360. Its totient is φ = 4342536.

The previous prime is 4539929. The next prime is 4539949. The reversal of 4539947 is 7499354.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7499354 = 2 ⋅3749677.

It is a cyclic number.

It is not a de Polignac number, because 4539947 - 2⁶ = 4539883 is a prime.

It is a super-2 number, since 2×4539947² = 41222237525618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4539949) 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, 98672 + ... + 98717.

It is an arithmetic number, because the mean of its divisors is an integer number (1184340).

Almost surely, 2^4539947 is an apocalyptic number.

4539947 is a deficient number, since it is larger than the sum of its proper divisors (197413).

4539947 is a wasteful number, since it uses less digits than its factorization.

4539947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197412.

The product of its digits is 136080, while the sum is 41.

The square root of 4539947 is about 2130.7151381637. The cubic root of 4539947 is about 165.5834502158.

The spelling of 4539947 in words is "four million, five hundred thirty-nine thousand, nine hundred forty-seven".