4000001509 has 4 divisors (see below), whose sum is σ = 4571430304. Its totient is φ = 3428572716.

The previous prime is 4000001501. The next prime is 4000001521. The reversal of 4000001509 is 9051000004.

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 4000001509 - 2³ = 4000001501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4000001501) 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, 285714387 + ... + 285714400.

It is an arithmetic number, because the mean of its divisors is an integer number (1142857576).

Almost surely, 2^4000001509 is an apocalyptic number.

It is an amenable number.

4000001509 is a deficient number, since it is larger than the sum of its proper divisors (571428795).

4000001509 is an equidigital number, since it uses as much as digits as its factorization.

4000001509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571428794.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 4000001509 is about 63245.5651330589. The cubic root of 4000001509 is about 1587.4012515839.

The spelling of 4000001509 in words is "four billion, one thousand, five hundred nine".