4209397 has 4 divisors (see below), whose sum is σ = 4345216. Its totient is φ = 4073580.

The previous prime is 4209389. The next prime is 4209407. The reversal of 4209397 is 7939024.

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.

It is a cyclic number.

It is not a de Polignac number, because 4209397 - 2³ = 4209389 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 (4209097) 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, 67863 + ... + 67924.

It is an arithmetic number, because the mean of its divisors is an integer number (1086304).

Almost surely, 2^4209397 is an apocalyptic number.

It is an amenable number.

4209397 is a deficient number, since it is larger than the sum of its proper divisors (135819).

4209397 is a wasteful number, since it uses less digits than its factorization.

4209397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135818.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 4209397 is about 2051.6815054974. The cubic root of 4209397 is about 161.4631034576.

The spelling of 4209397 in words is "four million, two hundred nine thousand, three hundred ninety-seven".