13929646 has 4 divisors (see below), whose sum is σ = 20894472. Its totient is φ = 6964822.

The previous prime is 13929631. The next prime is 13929659. The reversal of 13929646 is 64692931.

13929646 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: 64692931 = 1901 ⋅34031.

It is a super-3 number, since 3×13929646³ (a number of 22 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 13929599 and 13929608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3482410 + ... + 3482413.

It is an arithmetic number, because the mean of its divisors is an integer number (5223618).

Almost surely, 2^13929646 is an apocalyptic number.

13929646 is a deficient number, since it is larger than the sum of its proper divisors (6964826).

13929646 is an equidigital number, since it uses as much as digits as its factorization.

13929646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6964825.

The product of its digits is 69984, while the sum is 40.

The square root of 13929646 is about 3732.2440970547. The cubic root of 13929646 is about 240.6098264677.

The spelling of 13929646 in words is "thirteen million, nine hundred twenty-nine thousand, six hundred forty-six".