13929634 has 4 divisors (see below), whose sum is σ = 20894454. Its totient is φ = 6964816.

The previous prime is 13929631. The next prime is 13929659. The reversal of 13929634 is 43692931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43692931 = 3919 ⋅11149.

It can be written as a sum of positive squares in only one way, i.e., 13344409 + 585225 = 3653^2 + 765^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13929593 and 13929602.

It is not an unprimeable number, because it can be changed into a prime (13929631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3482407 + ... + 3482410.

Almost surely, 2^13929634 is an apocalyptic number.

13929634 is a deficient number, since it is larger than the sum of its proper divisors (6964820).

13929634 is an equidigital number, since it uses as much as digits as its factorization.

13929634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6964819.

The product of its digits is 34992, while the sum is 37.

The square root of 13929634 is about 3732.2424894425. The cubic root of 13929634 is about 240.6097573748.

It can be divided in two parts, 1392 and 9634, that added together give a triangular number (11026 = T₁₄₈).

The spelling of 13929634 in words is "thirteen million, nine hundred twenty-nine thousand, six hundred thirty-four".