13640383 has 8 divisors (see below), whose sum is σ = 14056352. Its totient is φ = 13226976.

The previous prime is 13640381. The next prime is 13640401. The reversal of 13640383 is 38304631.

13640383 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a 5-Lehmer number, since φ(13640383) divides (13640383-1)⁵.

It is a cyclic number.

It is not a de Polignac number, because 13640383 - 2¹ = 13640381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13640381) 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, 17641 + ... + 18397.

It is an arithmetic number, because the mean of its divisors is an integer number (1757044).

Almost surely, 2^13640383 is an apocalyptic number.

13640383 is a deficient number, since it is larger than the sum of its proper divisors (415969).

13640383 is an equidigital number, since it uses as much as digits as its factorization.

13640383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1281.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 13640383 is about 3693.2889136920. The cubic root of 13640383 is about 238.9326619465.

The spelling of 13640383 in words is "thirteen million, six hundred forty thousand, three hundred eighty-three".