4009557 has 4 divisors (see below), whose sum is σ = 5346080. Its totient is φ = 2673036.

The previous prime is 4009549. The next prime is 4009619. The reversal of 4009557 is 7559004.

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 not a de Polignac number, because 4009557 - 2³ = 4009549 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4009507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 668257 + ... + 668262.

It is an arithmetic number, because the mean of its divisors is an integer number (1336520).

Almost surely, 2^4009557 is an apocalyptic number.

It is an amenable number.

4009557 is a deficient number, since it is larger than the sum of its proper divisors (1336523).

4009557 is a wasteful number, since it uses less digits than its factorization.

4009557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1336522.

The product of its (nonzero) digits is 6300, while the sum is 30.

The square root of 4009557 is about 2002.3878245735. The cubic root of 4009557 is about 158.8664279101.

The spelling of 4009557 in words is "four million, nine thousand, five hundred fifty-seven".