13919147 has 4 divisors (see below), whose sum is σ = 15184536. Its totient is φ = 12653760.

The previous prime is 13919137. The next prime is 13919161. The reversal of 13919147 is 74191931.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13919147 - 2⁶ = 13919083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13919137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 632678 + ... + 632699.

It is an arithmetic number, because the mean of its divisors is an integer number (3796134).

Almost surely, 2^13919147 is an apocalyptic number.

13919147 is a deficient number, since it is larger than the sum of its proper divisors (1265389).

13919147 is a wasteful number, since it uses less digits than its factorization.

13919147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1265388.

The product of its digits is 6804, while the sum is 35.

The square root of 13919147 is about 3730.8373054852. The cubic root of 13919147 is about 240.5493607650.

The spelling of 13919147 in words is "thirteen million, nine hundred nineteen thousand, one hundred forty-seven".