13640907 has 8 divisors (see below), whose sum is σ = 20786176. Its totient is φ = 7794792.

The previous prime is 13640867. The next prime is 13640911. The reversal of 13640907 is 70904631.

It is a happy number.

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

It is not a de Polignac number, because 13640907 - 2¹⁵ = 13608139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13640947) 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, 324763 + ... + 324804.

It is an arithmetic number, because the mean of its divisors is an integer number (2598272).

Almost surely, 2^13640907 is an apocalyptic number.

13640907 is a deficient number, since it is larger than the sum of its proper divisors (7145269).

13640907 is an equidigital number, since it uses as much as digits as its factorization.

13640907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649577.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 13640907 is about 3693.3598524920. The cubic root of 13640907 is about 238.9357214674.

The spelling of 13640907 in words is "thirteen million, six hundred forty thousand, nine hundred seven".