13640869 has 8 divisors (see below), whose sum is σ = 14908608. Its totient is φ = 12377760.

The previous prime is 13640867. The next prime is 13640911. The reversal of 13640869 is 96804631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13640869 - 2¹ = 13640867 is a prime.

It is a super-2 number, since 2×13640869² = 372146614150322, which contains 22 as substring.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13640867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8704 + ... + 10150.

It is an arithmetic number, because the mean of its divisors is an integer number (1863576).

Almost surely, 2^13640869 is an apocalyptic number.

It is an amenable number.

13640869 is a deficient number, since it is larger than the sum of its proper divisors (1267739).

13640869 is a wasteful number, since it uses less digits than its factorization.

13640869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2315.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 13640869 is about 3693.3547081211. The cubic root of 13640869 is about 238.9354995964.

The spelling of 13640869 in words is "thirteen million, six hundred forty thousand, eight hundred sixty-nine".