13640951 has 4 divisors (see below), whose sum is σ = 13931232. Its totient is φ = 13350672.

The previous prime is 13640947. The next prime is 13640989. The reversal of 13640951 is 15904631.

13640951 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15904631 = 1801 ⋅8831.

It is a cyclic number.

It is not a de Polignac number, because 13640951 - 2² = 13640947 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 (13640911) 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, 145070 + ... + 145163.

It is an arithmetic number, because the mean of its divisors is an integer number (3482808).

Almost surely, 2^13640951 is an apocalyptic number.

13640951 is a deficient number, since it is larger than the sum of its proper divisors (290281).

13640951 is an equidigital number, since it uses as much as digits as its factorization.

13640951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290280.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 13640951 is about 3693.3658091232. The cubic root of 13640951 is about 238.9359783702.

The spelling of 13640951 in words is "thirteen million, six hundred forty thousand, nine hundred fifty-one".