15941009 has 4 divisors (see below), whose sum is σ = 18218304. Its totient is φ = 13663716.

The previous prime is 15940999. The next prime is 15941021. The reversal of 15941009 is 90014951.

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 15941009 - 2⁴ = 15940993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15941059) 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, 1138637 + ... + 1138650.

It is an arithmetic number, because the mean of its divisors is an integer number (4554576).

Almost surely, 2^15941009 is an apocalyptic number.

It is an amenable number.

15941009 is a deficient number, since it is larger than the sum of its proper divisors (2277295).

15941009 is an equidigital number, since it uses as much as digits as its factorization.

15941009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2277294.

The product of its (nonzero) digits is 1620, while the sum is 29.

The square root of 15941009 is about 3992.6193156874. The cubic root of 15941009 is about 251.6741452587.

The spelling of 15941009 in words is "fifteen million, nine hundred forty-one thousand, nine".