13923478 has 4 divisors (see below), whose sum is σ = 20885220. Its totient is φ = 6961738.

The previous prime is 13923473. The next prime is 13923479. The reversal of 13923478 is 87432931.

13923478 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: 87432931 = 1217 ⋅71843.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13923473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3480868 + ... + 3480871.

It is an arithmetic number, because the mean of its divisors is an integer number (5221305).

Almost surely, 2^13923478 is an apocalyptic number.

13923478 is a deficient number, since it is larger than the sum of its proper divisors (6961742).

13923478 is an equidigital number, since it uses as much as digits as its factorization.

13923478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6961741.

The product of its digits is 36288, while the sum is 37.

The square root of 13923478 is about 3731.4176930491. The cubic root of 13923478 is about 240.5743074863.

The spelling of 13923478 in words is "thirteen million, nine hundred twenty-three thousand, four hundred seventy-eight".