13919967 has 6 divisors (see below), whose sum is σ = 20106632. Its totient is φ = 9279972.

The previous prime is 13919963. The next prime is 13919977. The reversal of 13919967 is 76991931.

It is not a de Polignac number, because 13919967 - 2² = 13919963 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 (13919963) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 773323 + ... + 773340.

Almost surely, 2^13919967 is an apocalyptic number.

13919967 is a deficient number, since it is larger than the sum of its proper divisors (6186665).

13919967 is a wasteful number, since it uses less digits than its factorization.

13919967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1546669 (or 1546666 counting only the distinct ones).

The product of its digits is 91854, while the sum is 45.

The square root of 13919967 is about 3730.9471987687. The cubic root of 13919967 is about 240.5540843926.

The spelling of 13919967 in words is "thirteen million, nine hundred nineteen thousand, nine hundred sixty-seven".