4509397 has 4 divisors (see below), whose sum is σ = 4523116. Its totient is φ = 4495680.

The previous prime is 4509377. The next prime is 4509409. The reversal of 4509397 is 7939054.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7939054 = 2 ⋅3969527.

It can be written as a sum of positive squares in 2 ways, for example, as 857476 + 3651921 = 926^2 + 1911^2 .

It is a cyclic number.

It is not a de Polignac number, because 4509397 - 2⁷ = 4509269 is a prime.

It is a super-2 number, since 2×4509397² = 40669322607218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4509317) 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, 6354 + ... + 7027.

It is an arithmetic number, because the mean of its divisors is an integer number (1130779).

Almost surely, 2^4509397 is an apocalyptic number.

It is an amenable number.

4509397 is a deficient number, since it is larger than the sum of its proper divisors (13719).

4509397 is a wasteful number, since it uses less digits than its factorization.

4509397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13718.

The product of its (nonzero) digits is 34020, while the sum is 37.

The square root of 4509397 is about 2123.5340826085. The cubic root of 4509397 is about 165.2112018427.

The spelling of 4509397 in words is "four million, five hundred nine thousand, three hundred ninety-seven".