4009657 has 4 divisors (see below), whose sum is σ = 4014720. Its totient is φ = 4004596.

The previous prime is 4009639. The next prime is 4009667. The reversal of 4009657 is 7569004.

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 4009657 - 2⁷ = 4009529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4009667) 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, 1057 + ... + 3022.

It is an arithmetic number, because the mean of its divisors is an integer number (1003680).

Almost surely, 2^4009657 is an apocalyptic number.

It is an amenable number.

4009657 is a deficient number, since it is larger than the sum of its proper divisors (5063).

4009657 is an equidigital number, since it uses as much as digits as its factorization.

4009657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5062.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 4009657 is about 2002.4127946055. The cubic root of 4009657 is about 158.8677486305.

The spelling of 4009657 in words is "four million, nine thousand, six hundred fifty-seven".