13997619 has 6 divisors (see below), whose sum is σ = 20218796. Its totient is φ = 9331740.

The previous prime is 13997617. The next prime is 13997629. The reversal of 13997619 is 91679931.

It is not a de Polignac number, because 13997619 - 2¹ = 13997617 is a prime.

It is a super-2 number, since 2×13997619² = 391866675338322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13997611) 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 5 ways as a sum of consecutive naturals, for example, 777637 + ... + 777654.

Almost surely, 2^13997619 is an apocalyptic number.

13997619 is a deficient number, since it is larger than the sum of its proper divisors (6221177).

13997619 is a wasteful number, since it uses less digits than its factorization.

13997619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1555297 (or 1555294 counting only the distinct ones).

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

The square root of 13997619 is about 3741.3391987362. The cubic root of 13997619 is about 241.0005624316. Note that the first 3 decimals are identical.

The spelling of 13997619 in words is "thirteen million, nine hundred ninety-seven thousand, six hundred nineteen".